ABC Corporation has three service departments with the following costs and activity base: Service Department Cost Activity Base for Allocation Graphics Production $200,000 # of copies Accounting $500,000 # of invoices processed Personnel Department $400,000 # of employees ABC has three operating divisions, Micro, Macro and Super. Their revenue, cost and activity information are as follows: Micro Macro Super Direct Revenues $700,000 $850,000 $650,000 Direct Operating Expenses $50,000 $70,000 $100,000 # of copies made 20,000 30,000 50,000 # invoices processed 700 800 500 # of employees 130 145 125 What is the service department charge rate for the Accounting Department? a. $.004 b. $250 c. $714 d. $625