Tne inventory records for Raymond Co. reflected the following Beginning Inventory@May 360 units @ $210 600 units $2.70 550 units @ $2.70 First Purchase @ May 7 Second Purchase May 17 Third Purchase@ May 23 400 units$260 Sales @ May 31 1,650 units $3.00 Determine the amount of gross margin assuming the weighted average cost flovw method. (Do not round average cost per unit and round your answer to the nearest whole number.)