📚 Year 8 Edexcel Business: Formulas & Key Principles Quick Reference | Edexcel 商务 Year 8 公式定理速查手册
This handbook brings together all the essential formulas and key principles you need to master for Year 8 Edexcel Business. Each entry is presented with a clear definition, the fundamental equation where applicable, and a brief explanation of how it is used. Use this page for quick revision and to check your understanding before tests.
本手册汇集了 Year 8 Edexcel 商务课程中你必须掌握的所有核心公式和关键原理。每个条目都给出了清晰的定义、适用的基本公式以及简短的使用说明。你可以在考前使用本页快速复习并检验自己的理解。
1. Profit Equation | 利润公式
Profit measures the financial gain a business makes after all costs have been paid. The fundamental profit formula is: Profit = Total Revenue – Total Costs.
利润衡量的是企业在支付所有成本后获得的财务收益。基本的利润公式为：利润 = 总收入 – 总成本。
If the result is positive, the business is said to be making a profit. A negative result means the business is making a loss. Profit is the main incentive for entrepreneurs and is essential for long-term survival and growth.
如果结果为正，说明企业正在盈利。负值则表示企业正在亏损。利润是企业家的主要动力，对长期生存和发展至关重要。
2. Total Revenue | 总收入
Total revenue is the income a business receives from selling its goods or services. The formula is: Total Revenue = Price per unit × Quantity sold.
总收入是企业销售商品或服务所获得的收入。计算公式为：总收入 = 单价 × 销售量。
For example, if a shop sells 200 mugs at £5 each, total revenue = £5 × 200 = £1,000. Revenue is sometimes called turnover or sales revenue. It does not take costs into account, so high revenue does not automatically mean high profit.
例如，一家店以每个 5 英镑的价格卖出 200 个杯子，总收入 = £5 × 200 = £1,000。收入有时也称为营业额或销售收入。它不扣除成本，因此高收入并不自动意味着高利润。
3. Total Costs | 总成本
Total costs represent all the money a business spends to produce and sell its products. The formula is: Total Costs = Fixed Costs + Variable Costs.
总成本代表企业为生产和销售产品所支出的全部费用。计算公式为：总成本 = 固定成本 + 变动成本。
Fixed costs stay the same regardless of output (e.g., rent, insurance). Variable costs change directly with the level of production or sales (e.g., raw materials, packaging). Controlling costs is vital because even a small reduction can significantly boost profit.
固定成本不随产量变化（如租金、保险）。变动成本则直接随生产或销售水平变化（如原材料、包装）。控制成本至关重要，因为即使成本小幅下降也能显著提高利润。
4. Contribution and Break-even Point | 贡献毛利与盈亏平衡点
Contribution is the amount each unit sold contributes towards covering fixed costs and generating profit. Contribution per unit = Selling price per unit – Variable cost per unit.
贡献毛利是指每售出一单位产品所能用来补偿固定成本并创造利润的金额。单位贡献毛利 = 单位售价 – 单位变动成本。
The break-even point is the level of output where total revenue equals total costs, so the business makes neither a profit nor a loss. The formula is: Break-even output = Fixed Costs ÷ Contribution per unit. Understanding contribution helps firms set prices and plan production levels.
盈亏平衡点是指总收入等于总成本时的产量水平，此时企业不盈不亏。计算公式为：盈亏平衡产量 = 固定成本 ÷ 单位贡献毛利。理解贡献毛利有助于企业设定价格和规划产量。
5. Average Cost (Unit Cost) | 平均成本（单位成本）
Average cost tells us the cost of producing one single unit of output. It is calculated by: Average Cost = Total Costs ÷ Output.
平均成本告诉我们生产一单位产品所需的成本。计算方法为：平均成本 = 总成本 ÷ 产量。
If a business produces 1,000 units and total costs are £10,000, the average cost is £10 per unit. As output increases, average costs may fall if fixed costs are spread over more units. This is linked to the concept of economies of scale, which help a business become more competitive.
如果一家企业生产 1,000 件产品，总成本为 £10,000，那么平均成本就是每件 £10。随着产量增加，如果固定成本被分摊到更多产品上，平均成本可能下降。这与规模经济的概念有关，规模经济能帮助企业提高竞争力。
6. Added Value | 增加值
Added value is the difference between the selling price of a product and the cost of bought-in materials and components. The formula is: Added Value = Sales revenue – Cost of bought-in materials and services.
增加值是指产品的售价与外购材料及零部件的成本之间的差额。公式为：增加值 = 销售收入 – 外购材料与服务成本。
For example, a baker buys flour and other ingredients for £2 and sells the bread for £5. The added value is £3. Adding value allows a business to charge higher prices and earn greater profit. Ways to add value include improving design, offering excellent customer service, or building a strong brand.
例如，面包师以 £2 购买面粉和其他原料，将面包以 £5 出售，增加值就是 £3。创造增加值可以让企业收取更高的价格并赚取更多利润。增加价值的方式包括改进设计、提供卓越的客户服务或建立强大的品牌。
7. Profit Margin | 利润率
The profit margin shows what percentage of revenue becomes profit. It is a key indicator of profitability. Profit Margin (%) = (Profit ÷ Revenue) × 100.
利润率显示的是收入中有多大比例变成了利润，是衡量盈利能力的关键指标。利润率(%) = （利润 ÷ 收入）× 100。
If a business has a profit of £8,000 and revenue of £40,000, its profit margin is (8,000 ÷ 40,000) × 100 = 20%. A higher margin means the business is keeping more of each pound of sales. Managers compare margins over time and against competitors to judge performance.
如果一家企业的利润为 £8,000，收入为 £40,000，其利润率就是 (8,000 ÷ 40,000) × 100 = 20%。较高的利润率意味着企业从每英镑的销售额中保留得更多。管理者会对比不同时期的利润率以及与竞争对手的利润率来判断业绩。
8. Revenue Growth | 收入增长率
Revenue growth measures how much a firm’s sales income has increased over a period. The percentage change formula is: Revenue Growth (%) = [(Current revenue – Previous revenue) ÷ Previous revenue] × 100.
收入增长率衡量的是企业销售收入在一段时期内的增长幅度。百分比变化公式为：收入增长率(%) = [（本期收入 – 上期收入）÷ 上期收入] × 100。
Growing revenue is a sign that a business is expanding its customer base or selling more products. However, if costs rise even faster, profit might still fall. Rapid growth can also put pressure on resources and cash flow, so it must be managed carefully.
收入增长表明企业正在扩大客户群或销售更多产品。但如果成本上升得更快，利润仍然可能下降。快速增长也可能给资源和现金流带来压力，因此必须谨慎管理。
9. Market Share | 市场占有率
Market share tells us the proportion of total market sales held by one business. It is expressed as a percentage: Market Share (%) = (Company’s sales ÷ Total market sales) × 100.
市场占有率反映一家企业在市场总销售额中所占的比例，用百分比表示：市场占有率(%) = （企业销售额 ÷ 市场总销售额）× 100。
A business with high market share often benefits from stronger brand recognition and greater bargaining power with suppliers. Market share can be increased by lowering prices, running promotions, improving quality, or launching innovative products.
市场占有率高的企业通常享有更强的品牌认知度和与供应商更强的议价能力。可以通过降低价格、开展促销、提高质量或推出创新产品来提高市场占有率。
10. Labour Productivity | 劳动生产率
Labour productivity measures output per employee over a given period. The formula is: Labour Productivity = Total output ÷ Number of employees.
劳动生产率衡量的是每名员工在一定时期内的产出。公式为：劳动生产率 = 总产出 ÷ 员工人数。
If a factory produces 20,000 units with 50 workers, productivity is 400 units per worker. Higher productivity means the business is using its workforce more efficiently. Improving productivity can lower unit costs, increase profit, and make the business more competitive without raising prices.
如果一个工厂有 50 名工人，生产了 20,000 件产品，那么劳动生产率就是每名工人 400 件。较高的生产率意味着企业更有效地利用了劳动力。提高生产率可以降低单位成本、增加利润，并使企业在不提价的情况下更具竞争力。
11. Opportunity Cost | 机会成本
Opportunity cost is not a formula but a fundamental economic principle. It represents the value of the next best alternative that is given up when a choice is made. Every business decision involves an opportunity cost because resources are limited.
机会成本不是一个公式，而是一个基本的经济原理。它代表在做出某种选择时所放弃的次优选择的价值。由于资源有限，每一个商业决策都涉及机会成本。
For instance, if an entrepreneur chooses to invest £50,000 in new machinery rather than in a marketing campaign, the opportunity cost is the potential extra sales that the marketing campaign could have generated. Weighing opportunity costs helps businesses allocate resources wisely.
例如，如果一位企业家选择将 £50,000 投资于新机器而不是营销活动，那么机会成本就是该营销活动可能带来的额外销售额。权衡机会成本有助于企业明智地分配资源。
12. Cash Flow (Net Cash Flow) | 现金流（净现金流）
Cash flow is the movement of money into and out of a business. The basic net cash flow formula is: Net Cash Flow = Total cash inflows – Total cash outflows.
现金流是资金进出企业的流动。基本的净现金流公式为：净现金流 = 现金流入总量 – 现金流出总量。
Cash inflows include money from sales, loans, or investment. Cash outflows include payments for rent, wages, stock, and other bills. A positive net cash flow means more money is coming in than going out, which is essential for paying bills on time and avoiding insolvency. Even a profitable business can fail if it runs out of cash.
现金流入包括来自销售、贷款或投资的资金。现金流出包括支付租金、工资、库存和其他账单。正净现金流意味着流入的资金多于流出的资金，这对按时支付账单和避免破产至关重要。即使是盈利的企业，如果现金耗尽也可能倒闭。
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