Which of the following costs do not vary with the amount of output a firm produces? a. average fixed costs b. fixed costs and average fixed costs c. marginal costs and average fixed costs d. fixed costs

d. fixed costs

Explanation:

The fixed cost is the cost which does not change if there is a change in the level of production i.e if the production level is increased or decreased it the fixed cost would remain the same as it is previous before

Therefore according to the given situation, since the fixed does not vary with the amount of firm output

Hence, option d is correct

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