Problem 9 (a) EXE Limited has received an offer of quantity discounts on its order of materials as under: Price per tonne Tonnes $ Nos. 1,200 Less than 500 1,180 500 and less than 1,000 1,160 1,000 and less than 2,000 1,140 2,000 and less than 3,000 1,120 3,000 and above The annual requirement for the material is 5,000 tonnes. The ordering cost per order is $ 1,200 and the stock holding cost is estimated at 20% of material cost per annum. You are required to compute the most economical purchase level. (6) What will be your answer to the above question if there are no discounts offered and the price per tonne is $1,500