Paperclip Office Supplies records the cost of its inventory using the Weighted Average method using the perpetual approach. Below is the purchase and sale history of cat treats: Units Date May 1 May 2 May 9 May 12 Transaction Opening Bal Purchase Sale Purchase s/Unit 96 $ 31 $ 103 111 $ 65.19 69.80 ??? 63.21 May 21 Sale 451 ??? REQUIRED: Determine the Cost of Goods Sold for the month of May and the ending Inventory balance for the month. What if the business changed to the First-In, First Out method? What would be the value of the ending inventory in that case? Make sure you show all your work. (10 marks)