Grouper Company sells many products. Whamo is one of its popular items. Below is an analysis of the inventory purchases of Whamo for the month of March. At the end of the month, there were 280 units on hand. Grouper Company uses the periodic inventory system. Purchases Units Unit Cost Mar. 1 Beginning inventory 260 $76 Mar. 3 Purchase 220 91 Mar. 10 Purchase 360 98 Mar. 30 Purchase 200 106 (a) Using the FIFO cost formula, calculate the cost of goods sold for March. Cost of goods sold $