(Please write out correct answer and whether it's A, B, C or D). Thank you.

Exoplex Company has has the following divisions organized as profit centers, the Coastal Division, Central Division, and Metro Division. The revenues and expenses for the divisions are as follows: Metro Coastal Division Central Division Corporate Division Revenues 750,000 500,000 $ 1,000,000 Operating expenses 500,000 350,000 600,000 Customer support 180,000 100,000 Purchasing Information on usage of the service departments is: Coastal Division Metro Division Central Division Total Customer support: number of customer calls 3,000 5,000 7,000 15,000 Purchasing: number of purchase orders 1,500 1,500 2,000 5,000 How much is the service department charge rate for purchasing? O $25 per purchase order O $ 18 per purchase order $.05 per perchase order O $ 20 per purchase order