What are variable costs​

Variable costs are costs that change as the quantity of the good or service that a business produces changes. Variable costs are the sum of marginal costs over all units produced. They can also be considered normal costs. Fixed costs and variable costs make up the two components of total cost.

Variables: All the alphabets in an equation are termed as Variables

70

step-by-step explanation:

2*5=10

4*15=60

60+10=

70

the correct answer is d

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