Please write out correct answer and whether its 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: Coastal Division Metro Division Corporate Central Division $ 820,000 Revenues 900,000 625,000 Operating expenses 490,000 280,000 530,000 Customer support 230,000 Purchasing 250,000 Information on usage of the service departments is: Coastal Division Metro Division Central Division Total 2,000 4.000 6,000 12,000 Customer support: number of customer calls Purchasing: number of purchase orders 1,500 2,300 1,200 5.000 How much is the service department charge rate for purchasing? O 5.02 per purchase order $50 per purchase order $18 per purchase order $25 per purchase order