Calculate inventory and cost of goods sold using FIFO, LIFO, and average-cost in a periodic inventory system. Rusthe Inc. uses a periodic inventory system. Its records show the following for the month of May, in which 74 units were sold.

Date Explanation Units Unit Cost Total Cost May 1 Inventory 30 $ 8 $ 240 15 Purchase 25 11 275 24 Purchase 45 13 585 Total 100 $1.100