Required information [The following information applies to the questions displayed below] Benton Corporation manufactures computer microphones, which come in two models: Standard and Premium. Data for a representative quarter for the two models follow Units produced Production res per quarter Direct materials cost per unit Standard 12,000 FrANTIN 3,000 50 25 $ 30 50 $ 64 Direct labor cost per unit Manufacturing overhead in the plant has three main functions: supervision, setup labor, and incoming material inspection Data on manufacturing overhead for a representative quarter follow Supervision Setve lotior Inspection Total overhead $247,500 267,375 207,000 $723,075 Required: a. Benton currently applies overhead on the basis of direct labor cost. What is the predetermined overhead rate for the quarter b. The CFO and the plant controller at Benton are thinking of adopting an ABC system. They have tentatively chosen the following cost drivers direct labor cost for supervision, production runs for setup labor, and direct material dollars for incoming inspection Compute the cost driver rotes for the proposed system at Benton,