Use the Following Information to Answer Questions $S M C = 12 - 0.005 Q + 0.0000008 Q ^ { 2 }$

Use the following information to answer Questions.
Sport Tee Corporation manufactures T-shirts bearing the logos of professional baseball and football teams. The wholesale market for sport T-shirts is perfectly competitive.The manager forecasts the wholesale price of T-shirts next year to be $7.00. The firm's estimated marginal cost is $S M C = 12 - 0.005 Q + 0.0000008 Q ^ { 2 }$ where Q is the number of T-shirts produced and sold each month. Sport Tee Corporation will have a fixed cost of $2,000 per month.
-To maximize profit how many T-shirts should be produced and sold each month?

A) 1,000
B) 2,000
C) 3,000
D) 4,000
E) 5,000