Marginal cost practice problems

Microeconomics Unit 3. Try each one, then open the worked solution. The Credit Sprint app generates unlimited new versions with fresh numbers.

Problem 1.

Total cost is $355 at 4 units and $382 at 5 units. What is the marginal cost of unit 5?

Show solution

MC = ΔTC ÷ ΔQ = ($382 − $355) ÷ 1 = $27.

Problem 2.

Total cost is $135 at 4 units and $151 at 5 units. What is the marginal cost of unit 5?

Show solution

MC = ΔTC ÷ ΔQ = ($151 − $135) ÷ 1 = $16.

Problem 3.

Total cost is $150 at 12 units and $185 at 13 units. What is the marginal cost of unit 13?

Show solution

MC = ΔTC ÷ ΔQ = ($185 − $150) ÷ 1 = $35.

Problem 4.

Total cost is $330 at 8 units and $370 at 9 units. What is the marginal cost of unit 9?

Show solution

MC = ΔTC ÷ ΔQ = ($370 − $330) ÷ 1 = $40.

Problem 5.

Total cost is $165 at 3 units and $190 at 4 units. What is the marginal cost of unit 4?

Show solution

MC = ΔTC ÷ ΔQ = ($190 − $165) ÷ 1 = $25.

Problem 6.

Total cost is $245 at 3 units and $262 at 4 units. What is the marginal cost of unit 4?

Show solution

MC = ΔTC ÷ ΔQ = ($262 − $245) ÷ 1 = $17.