Scenario 13-6 A Certain Firm Produces and Sells Staplers.Last Year,it Produced 7,000

Scenario 13-6
A certain firm produces and sells staplers.Last year,it produced 7,000 staplers and sold each stapler for $6.In producing the 7,000 staplers,it incurred variable costs of $28,000 and a total cost of $45,000.
-Refer to Scenario 13-6.In producing the 7,000 staplers,the firm's average total cost was

A) $2.43.
B) $4.00.
C) $6.00.
D) $6.43.