Nkwe (Pty) Ltd uses the economic order quantity model to determine the quantity of raw materials to order. The following details concerning the raw materials are presented to you: Quantity of raw materials used per annum = 156 250 units Cost of placing an order = R50 Invoicing cost price per unit C R8,50 Annual holding/carrying costs = R2,50 per unit The number of orders to be placed in a year amount to Select one: OA. 20 orders OB. 60 orders OC. 30 orders OD. 63