Answer:
62.50 units
$3,866.25
Step-by-step explanation:
The price function is:


Profit as a function of quantity (P(Q)) is given by:

The quantity for which the derivate of the profit function is zero is the profit maximizing quantity:

The profit-maximizing quantity is 62.50 units
The economic profit for this production volume is:

The firm earns a profit of $3,866.25.