answer to letter B only. explain why the weighted average unit cost is $6.25?

weigh 20 F6-11 Dene Company uses a periodic inventory system and its accounting records include the following inven- Apply tory information for the month of July: Units Unit Cost Total Cost July 1 Inventory on hand 150 $5.00 $ 750.00 12 Purchase 230 6.75 1,552.50 Sale (250) .00 28 Purchase 490 7.00 3,430.00 A physical inventory count determined that 620 units were on hand at July 31. Instructions (a) Calculate the ending inventory and the cost of goods sold under (1) FIFO and (2) weighted average. (b) For item 2 of part (a), explain why the weighted average unit cost is not $6.25. (e) How do the results for part (a) differ from E6-6, where the same information for Dene Company was used in a perpetual inventory system