What is the equation for marginal cost (MC)?

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Prepare for the OnRamps Economics College Exam with detailed multiple-choice questions and explanations. Strengthen your understanding and boost your performance!

Multiple Choice

What is the equation for marginal cost (MC)?

Explanation:
Marginal cost is the cost of producing one more unit. It captures how total cost changes as output increases, so the standard formula is the change in total cost divided by the change in output (and in calculus form, the derivative of total cost with respect to quantity). This accounts for both variable costs that rise with output and any fixed costs spread over more units. If total cost rises from 100 to 110 when output goes from 5 to 6, MC = (110 − 100) / (6 − 5) = 10 per unit. That illustrates how MC reflects the additional expense of expanding production. Using only the change in variable cost would ignore any fixed costs in the calculation, and taking the ratio of changes like deltaTC/deltaVC or the inverse deltaTC/deltaOutput would not measure the cost of producing one more unit.

Marginal cost is the cost of producing one more unit. It captures how total cost changes as output increases, so the standard formula is the change in total cost divided by the change in output (and in calculus form, the derivative of total cost with respect to quantity). This accounts for both variable costs that rise with output and any fixed costs spread over more units.

If total cost rises from 100 to 110 when output goes from 5 to 6, MC = (110 − 100) / (6 − 5) = 10 per unit. That illustrates how MC reflects the additional expense of expanding production.

Using only the change in variable cost would ignore any fixed costs in the calculation, and taking the ratio of changes like deltaTC/deltaVC or the inverse deltaTC/deltaOutput would not measure the cost of producing one more unit.

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