Case Study Drill: Applying Accounting Principles | 案例分析实战演练

📚 Case Study Drill: Applying Accounting Principles | 案例分析实战演练

Welcome to your Year 9 accounting case study. Instead of memorising rules, we will work through a realistic business scenario step by step. You will see how every transaction flows from source documents into ledgers, a trial balance, and finally into financial statements. This hands-on practice will build your confidence in double‑entry bookkeeping and help you think like an accountant.

欢迎来到九年级会计案例分析。我们将逐步走过一个真实的商业情景，而非死记硬背规则。你将看到每笔交易如何从原始凭证流入分类账、试算平衡表，并最终进入财务报表。这种动手实践将增强你对复式记账的信心，帮助你像会计师一样思考。

1. Setting the Scene: Meet Bake&Co. | 场景设定：认识烘焙坊

Bake&Co. is a small bakery owned by Emma. She started the business on 1 March 2025 with £5,000 cash as capital. The business sells cakes and pastries. We will record the first month’s transactions and prepare the financial statements.

烘焙坊是Emma经营的一家小型面包店。她于2025年3月1日以5,000英镑现金作为资本创办了该企业，销售蛋糕和糕点。我们将记录第一个月的交易并编制财务报表。

Here are the transactions for March 2025:

以下是2025年3月的交易：

Date	Transaction
1 Mar	Emma invested £5,000 cash into the business.
2 Mar	Bought baking equipment for £2,000 cash.
3 Mar	Purchased flour and sugar on credit from Supplies Ltd for £300.
5 Mar	Sold cakes for cash, £800.
8 Mar	Paid rent £500 by bank transfer.
12 Mar	Sold pastries on credit to Café Nero for £250.
18 Mar	Received £150 from Café Nero as part payment.
25 Mar	Paid Supplies Ltd £200.
28 Mar	Emma withdrew £100 for personal use.
31 Mar	Baking supplies used during March: £120.

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2. Understanding the Double-Entry System | 理解复式记账系统

Every transaction affects at least two accounts. One account is debited and another is credited. The total debits must always equal total credits. This is the foundation of double‑entry bookkeeping.

每笔交易至少影响两个账户。一个账户记入借方，另一个账户记入贷方。借方总额必须始终等于贷方总额。这是复式记账的基础。

In our case, we will use T‑accounts to visualise the entries. The left side of a T‑account is the debit side; the right side is the credit side.

在本案例中，我们将使用T型账户来直观展示分录。T型账户的左侧是借方，右侧是贷方。

Let’s recall the basic rules:

让我们回顾基本规则：

• Assets increase on the debit side, decrease on the credit side. | 资产增加记借方，减少记贷方。
• Liabilities increase on the credit side, decrease on the debit side. | 负债增加记贷方，减少记借方。
• Capital increases on the credit side, decreases on the debit side. | 资本增加记贷方，减少记借方。
• Income is a credit entry. | 收入是贷方记录。
• Expenses are debit entries. | 费用是借方记录。

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3. Recording Transactions in T-Accounts | 在T型账户中记录交易

Now we will record the March transactions step by step. Keep your notebook ready and draw the T‑accounts as we go.

现在我们将逐步记录3月的交易。准备好你的笔记本，跟着我们画出T型账户。

1 Mar – Capital introduced
Debit: Cash £5,000 (asset increases)
Credit: Capital £5,000 (capital increases)
中文：借：现金 5,000英镑（资产增加） 贷：资本 5,000英镑（资本增加）

2 Mar – Equipment purchase
Debit: Equipment £2,000 (asset increases)
Credit: Cash £2,000 (asset decreases)
中文：借：设备 2,000英镑 贷：现金 2,000英镑

We can see an exchange of one asset for another. Total assets remain unchanged.

我们看到一种资产换为另一种资产。总资产保持不变。

3 Mar – Inventory purchase on credit
Debit: Purchases (or Supplies) £300 (expense or asset)
Credit: Trade Payables (Supplies Ltd) £300 (liability increases)
中文：借：采购/物料 300英镑 贷：应付账款（Supplies Ltd）300英镑

We treat the supplies as an expense when used, but initially they are recorded as purchases.

物料在使用时作为费用处理，但最初记录为采购。

5 Mar – Cash sales
Debit: Cash £800
Credit: Sales Revenue £800
中文：借：现金 800英镑 贷：销售收入 800英镑

8 Mar – Rent paid
Debit: Rent Expense £500
Credit: Cash (Bank) £500
中文：借：租金费用 500英镑 贷：现金（银行存款）500英镑

12 Mar – Credit sale
Debit: Trade Receivables (Café Nero) £250
Credit: Sales Revenue £250
中文：借：应收账款（Café Nero）250英镑 贷：销售收入 250英镑

18 Mar – Receipt from debtor
Debit: Cash £150
Credit: Trade Receivables £150
中文：借：现金 150英镑 贷：应收账款 150英镑

25 Mar – Payment to creditor
Debit: Trade Payables £200
Credit: Cash £200
中文：借：应付账款 200英镑 贷：现金 200英镑

28 Mar – Drawings
Debit: Drawings £100
Credit: Cash £100
中文：借：提款 100英镑 贷：现金 100英镑

31 Mar – Supplies used
This is an adjustment. We need to record the expense of £120, reducing the supplies asset.
Debit: Supplies Expense £120
Credit: Supplies (Purchases) £120
中文：借：物料费用 120英镑 贷：物料（采购）120英镑

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4. Balancing the Accounts | 账户结平

After recording all entries, we must balance each T‑account. The balance is the difference between the total debits and total credits. A debit balance means debits exceed credits; a credit balance means the opposite.

记录所有分录后，我们必须对每个T型账户进行结平。余额是借方总额与贷方总额之间的差额。借方余额表示借方大于贷方，贷方余额则相反。

Let’s calculate the balances for our main accounts:

让我们计算主要账户的余额：

Account	Calculation	Balance
Cash	+5000 -2000 +800 -500 +150 -200 -100	3,150 Dr
Equipment	+2000	2,000 Dr
Trade Receivables	+250 -150	100 Dr
Supplies (Purchases)	+300 -120	180 Dr
Trade Payables	+300 -200	100 Cr
Capital	+5000	5,000 Cr
Drawings	+100	100 Dr
Sales Revenue	+800 +250	1,050 Cr
Rent Expense	+500	500 Dr
Supplies Expense	+120	120 Dr

Notice that total debit balances equal total credit balances: £6,050 Dr = £6,050 Cr. This confirms our double‑entry is mathematically correct so far.

注意，借方余额总和等于贷方余额总和：6,050英镑借=6,050英镑贷。这证实了我们的复式分录在数学上是正确的。

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5. Trial Balance: The First Check | 试算平衡表：第一道检查

A trial balance lists all account balances at a given date. It is used to check the arithmetic accuracy of the ledger. If debit totals equal credit totals, the trial balance ‘agrees’.

试算平衡表列出特定日期的所有账户余额。它用于检查分类账的算术准确性。如果借方总额等于贷方总额，试算平衡表就“平衡”了。

Here is Bake&Co.’s trial balance as at 31 March 2025:

以下是烘焙坊截至2025年3月31日的试算平衡表：

Account	Debit (£)	Credit (£)
Cash	3,150
Equipment	2,000
Trade Receivables	100
Supplies (Inventory)	180
Trade Payables		100
Capital		5,000
Drawings	100
Sales Revenue		1,050
Rent Expense	500
Supplies Expense	120
Totals	6,150	6,150

Our trial balance agrees, meaning the ledger is arithmetically correct. Now we can confidently prepare the income statement and statement of financial position.

试算平衡表平衡，表明分类账在算术上是正确的。现在我们可以放心地编制利润表和财务状况表了。

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6. Preparing the Income Statement | 编制利润表

The income statement shows the business’s performance over a period. It matches revenue against expenses to calculate profit or loss.

利润表显示企业在一段时间内的业绩。它将收入与费用配比，计算出利润或亏损。

For Bake&Co., the period is one month ending 31 March 2025.

对于烘焙坊，期间是截至2025年3月31日的一个月。

Bake&Co. Income Statement for the month ended 31 March 2025

Sales Revenue	1,050
Less Expenses:
Rent Expense	(500)
Supplies Expense	(120)
Net Profit	430

Revenue £1,050 minus total expenses £620 equals a net profit of £430. This profit will be added to the capital in the statement of financial position.

收入1,050英镑减去总费用620英镑，净利润为430英镑。这笔利润将加到财务状况表的资本中。

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7. Preparing the Statement of Financial Position | 编制财务状况表（资产负债表）

The statement of financial position shows the assets, liabilities and capital of the business at a specific date. It follows the accounting equation: Assets = Capital + Liabilities.

财务状况表显示企业在特定日期的资产、负债和资本。它遵循会计等式：资产 = 资本 + 负债。

Bake&Co. Statement of Financial Position as at 31 March 2025

Assets	£
Equipment	2,000
Supplies (Inventory)	180
Trade Receivables	100
Cash	3,150
Total Assets	5,430
Capital and Liabilities
Capital (start)	5,000
Add: Net Profit	430
Less: Drawings	(100)
Closing Capital	5,330
Trade Payables	100
Total Capital and Liabilities	5,430

The accounting equation balances: £5,430 = £5,330 + £100. This proves the accuracy of our double‑entry records.

会计等式平衡：5,430英镑 = 5,330英镑 + 100英镑。这证明了复式记录的准确性。

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8. Analysing Profitability | 分析盈利能力

Profitability tells us how effectively the business is generating profit. We can calculate the net profit margin:

盈利能力告诉我们企业创造利润的效率。我们可以计算净利润率：

Net Profit Margin = (Net Profit ÷ Sales Revenue) × 100

For Bake&Co.: (430 ÷ 1050) × 100 ≈ 40.95%. This means for every £1 of sales, Emma earns about 41 pence in net profit. It is a healthy margin for a small bakery.

对于烘焙坊：(430 ÷ 1050) × 100 ≈ 40.95%。这意味着每1英镑的销售额，Emma就能获得约41便士的净利润。对于一家小型面包店来说，这是一个健康利润率。

We can also see that the business has no long‑term debts, just a small trade payable of £100. This shows low financial risk.

我们还可以看到，该企业没有长期债务，只有一笔100英镑的应付账款。这表明财务风险较低。

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9. Identifying Errors and Making Corrections | 识别错误并更正

Even when the trial balance agrees, errors can still exist. Common errors include omission, commission, principle, compensating errors, and complete reversal of entries.

即使试算平衡表平衡，错误仍可能存在。常见错误包括遗漏、记账错误、原则性错误、抵消性错误和完全颠倒分录。

Suppose we had recorded the rent payment as a debit to Equipment instead of Rent Expense. The trial balance would still balance but expenses would be understated and assets overstated. Always check the nature of each transaction.

假设我们将租金支付错误地记作借方设备而非租金费用。试算平衡表仍然平衡，但费用被低估了，资产被高估了。务必检查每笔交易的性质。

Another example: if we forgot the credit sale entirely, both trade receivables and sales revenue would be lower by £250, but the trial balance would still agree. That is an error of omission.

另一个例子：如果我们完全忘记了赊销，应收账款和销售收入都会少250英镑，但试算平衡表仍然平衡。这就是遗漏错误。

When you spot an error, you must pass a rectifying journal entry. For example, to correct the rent error:

发现错误时，必须通过更正分录来修正。例如，修正租金错误：

• Debit Rent Expense £500, Credit Equipment £500. (Reverse incorrect debit, record correct one.) | 借：租金费用 500英镑，贷：设备 500英镑。（冲销错误借方，记录正确分录。）

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10. Cash vs. Credit Transactions | 现金交易与赊账交易

Understanding the difference between cash and credit transactions is essential. Cash transactions involve immediate payment or receipt of money. Credit transactions create a debtor (trade receivable) or a creditor (trade payable).

理解现金交易与赊账交易的区别至关重要。现金交易涉及即时付款或收款。赊账交易则产生债务人（应收账款）或债权人（应付账款）。

In Bake&Co., the sale to Café Nero on 12 March was a credit transaction. That is why we debited Trade Receivables, not Cash. When Café Nero paid £150 later, we reduced the receivable and increased cash. The remaining £100 is still owed.

在烘焙坊中，3月12日向Café Nero的销售是一笔赊账交易。这就是我们借记应收账款而非现金的原因。后来Café Nero支付了150英镑时，我们减少了应收账款并增加了现金。剩余的100英镑仍欠着。

Similarly, the purchase from Supplies Ltd on 3 March was on credit. The payment on 25 March settled part of the debt. The £100 balance remains a liability.

同样，3月3日从Supplies Ltd的采购是赊购。3月25日的付款结清了部分债务。100英镑余额仍为负债。

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11. The Importance of Source Documents | 原始凭证的重要性

Every transaction we recorded should be supported by a source document. For cash sales, it is a receipt; for credit purchases, an invoice; for bank transfers, a bank statement.

我们记录的每一笔交易都应有原始凭证支持。现金销售应为收据；赊购为发票；银行转账为银行对账单。

Common source documents include:

常见原始凭证包括：

• Invoice – issued when a credit sale or purchase occurs. | 发票 – 赊销或赊购时开具。
• Receipt – proof of cash received. | 收据 – 现金收到的证明。
• Bank statement – shows all bank transactions. | 银行对账单 – 显示所有银行交易。
• Cheque counterfoil – record of payment by cheque. | 支票存根 – 支票付款记录。
• Petty cash voucher – for small cash expenses. | 零用现金凭证 – 用于小额现金支出。

In an exam, you might be asked to identify which document relates to a given transaction. Always think: who pays, who receives, and is it cash or credit?

在考试中，可能会要求你识别与给定交易相关的凭证。始终思考：谁付款、谁收款，是现金还是赊账？

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12. Key Takeaways from the Case | 案例总结

This case study has walked you through the entire accounting cycle for a small business. You have seen how raw transactions become financial statements. The key lessons are:

本案例分析带你走完了小型企业的一个完整会计循环。你已看到原始交易是如何变成财务报表的。关键要点如下：

• Double‑entry ensures the accounting equation always stays in balance. | 复式记账确保会计等式始终保持平衡。
• A trial balance checks arithmetic, but not all errors. | 试算平衡表检验算术准确性，但不能发现所有错误。
• The income statement shows profit; the statement of financial position shows wealth. | 利润表显示盈利，财务状况表显示财富。
• Drawings reduce capital, not expenses. | 提款减少资本，不是费用。
• Source documents provide evidence for every entry. | 原始凭证为每笔分录提供证据。

Practice with fresh transactions regularly. Build your own T‑accounts, trial balances and statements. Accounting is a skill best learned by doing.

定期用新交易练习。建立你自己的T型账户、试算平衡表和报表。会计是一门通过实践才能学好的技能。

Published by TutorHao | Accounting Revision Series | aleveler.com

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