2 A company uses raw materials at a rate of 30 tons per year. The purchase cost is 30 per ton, order cost 10 per order, and stock-holding cost 20 per cent per annum. (i) Find the economic order quantity and minimum acquisition cost. (ii) The firm is offered a discount of 2 per cent of the purchase cost if it orders in lots of 15 tons. Is it worth accepting the discount? (iii) As a result of external factors the purchase price of the raw material increases to 40 per ton. However, at the same time new technology reduces the stock-holding cost. If the optimum number of orders stays the same as in question (i), what must the new holding cost fall to?