i cant figure this out

Mary Company reports the following for the month of June. Date Units Total Cost June 1 12 Explanation Inventory Purchase Purchase Inventory 640 940 1,140 670 Unit Cost $5 6 7 $3,200 5,640 7,980 23 30 Calculate the cost of the ending inventory and the cost of goods sold for each cost flow assumption, using a perpetual inventory system. Assume a sale of 1,010 units occurred on June 15 for a selling price of $8 and a sale of 1,040 units on June 27 for $9. (Round average cost per unit to 3 decimal places, e.g. 5.254 and final answers to decimal places, e.g. 2,520.) FIFO $ LIFO $ Moving Average $ Cost of the ending inventory $ Cost of goods sold $ $ $