Answer:
8 units
Explanation:
P = $68 per unit
MC = 9q
Fixed cost = $60
It is noted that seller can sell as much as a product at $68 per unit. This means that the firm is price taken, hence, it is case of perfect competition.
For a perfectly competitive firm, the optimal output is at: P = MC
i.e. 68 = 9q
=> q = 68/9
=> q = 7.556
> q = 8
So, the optimal output level is 8 units.