Answer:
C) its average cost is less than its marginal cost.
Step-by-step explanation:
average total cost per calculator (when 500 calculators are built) = $35,000 / 500 calculators = $70 per calculator
average total cost per calculator (when 501 calculators are built) = $35,080 / 500 calculators = $70.02 per calculator
marginal cost of producing calculator 501 = total cost - cost of producing 500 calculators = $35,080 - $35,000 = $80
The average total cost per calculator is lower than the marginal cost of producing the 501th calculator ⇒ $80 > $70.02