At the end of the year, Randys Parts Company had the following items in inventory. Item Quantity Unit Cost Unit Market Value P1 68 $ 87 $ 89 P2 36 64 74 P3 90 136 124 P4 44 61 69 Required a. Determine the amount of ending inventory using the lower-of-cost-or-market rule applied to each individual inventory item. b. Provide the general journal entry necessary to write down the inventory based on Requirement a. Assume that Randys Parts Company uses the perpetual inventory system. c. Determine the amount of ending inventory, assuming that the lower-of-cost-or-market rule is applied to the total inventory in aggregate. d. Provide the general journal entry necessary to write down the inventory based on Requirement c. Assume that Randys Parts Company uses the perpetual inventory system