Explain the concept of variable cost with diagram

1.	Explain the concept of variable cost with diagram
Answer» Variable costs are costs that change in proportion to the good or service that a business produces. Variable costs are also the sum of marginal costs over all units produced.<br>Variable cost means changeable cost that can be change with every additional unit . This cost os an expenditure on variable factor like cost on inputs . This is also called prime cost or direct cost . This is also called prime cost because it is the first and primary cost that helps to produce output. It\'s diagram is available in book

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