Answer:
profit maximizing output is 4; $28
Step-by-step explanation:
Noel’s firm charges the market price for window washing jobs = $30/job
Marginal cost for the 5th unit of output:
= Total cost from 5th unit - Total cost from 4th unit
= $129 - $92
= $37
At 5th level of output, the marginal cost is greater than the market price for window washing jobs.
Therefore, the profit maximizing output is 4.
Profit = (market price × output) - Total cost
= ($30 × 4) - 92
= $120 - $92
= $28