2.2.2 - Sales, Revenue and Costs
This lesson focuses on two core Business calculations: working out how many units a firm sells, how much money those sales generate, and separating costs into fixed and variable elements. That matters in both exams and real decision-making because managers need more than busy stores or full order books; they need sales revenue that can cover costs, and you need to show the correct formula and the business meaning of the number.
Sales Volume And Sales Revenue
Start with the key distinction. Sales volume measures how many units are sold. Sales revenue measures the money value of those sales. They are linked, but they are not the same thing. A business can sell more units and still earn less revenue if the selling price has been cut too far.
Sales volume
The number of units sold in a time period.
Sales revenue
Selling price x sales volume.
That distinction is a high-yield exam point because students often talk about "higher sales" without making clear whether they mean a larger quantity sold or a higher money value. If sales volume rises while price stays the same, sales revenue rises because more units are being sold. If price falls, however, the rise in volume has to be large enough to offset the lower price.
Sales Revenue
For quick revision, keep the language precise: sales volume is the number sold; sales revenue is the value of those sales.
Calculating Sales Figures
When both selling price and quantity sold are given, calculate sales revenue by multiplying them together. If the question gives sales revenue and selling price instead, rearrange the formula and divide sales revenue by selling price to find sales volume.
For example, if weekly sales revenue is £2,400 and the average selling price is £6, sales volume is 400 units because 2,400 / 6 = 400.
This is why the distinction matters in decisions about pricing. More volume does not automatically mean more revenue, because the final figure depends on both parts of the formula.
| Pricing plan | Selling price | Sales volume | Sales revenue |
|---|---|---|---|
| A | £6 | 400 units | £2,400 |
| B | £5 | 450 units | £2,250 |
| C | £4 | 520 units | £2,080 |
The table shows why firms cannot judge performance from volume alone. Plan C sells the most units, but it produces the lowest sales revenue because the selling price is much lower.
At Starbucks, a branch's sales revenue depends on both the number of drinks sold and the average selling price. A branch that sells fewer drinks than another branch could still generate similar or higher revenue if more customers buy larger or premium drinks.
Fixed And Variable Costs
Managers also need to know which costs stay the same when output changes and which costs rise with activity. That matters because once output starts to increase, variable costs usually increase as well, and therefore total costs rise. If managers misclassify costs, they can make poor pricing and production decisions.
Fixed costs
Costs that do not change when output/sales changes.
Variable costs
Costs that vary according to the level of output.
Fixed costs are often linked to time. A business may still have to pay rent, insurance or salaried management even if output is low. Variable costs are linked more directly to producing or selling units, such as ingredients, packaging or piece-rate labour. Total costs are the sum of fixed costs and total variable costs.
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