3. The following are data available for Blue Grass for the month of June (worth 10 points each) 1200 units Sales Beginning inventory Purchases, in chronological order 300 units $2.00 600 units S2.10 400 units 5220 500 units $2.30 Calculate cost of goods sold and ending inventory under the following cost flow assumptions: (1.) Weighted average (2.) FIFO (3.) LIFO