a) Fill in the missing numbers in the inventory schedule using the weighted-average cost inventory valuation method. This company uses the perpetual inventory system. Do not enter dollar signs or commas in the input boxes. Round all answers to 2 decimal places. All unit cost calculations should be rounded to 2 decimal places as well. Inventory Schedule PurchasesSalesBalance TransactionDescriptionQuantityAmountQuantityAmountQuantityAmount Opening Balance0$ 0 May 5Purchase from AAA Co.600$8,400.00Answer 600 $Answer Answer $Answer May 7Sale to SSS Co.Answer $Answer Answer 14.00 $Answer 300$4,200.00 May 13Sale to TTT Co.Answer $Answer 150$Answer Answer $Answer May 15Purchase from BBB Co.90$1,800.00Answer $Answer Answer $Answer May 24Sale to UUU Co.Answer $Answer 20$Answer Answer $Answer May 28Purchase from CCC Co.80$1,200.00Answer $Answer Answer $Answer b) If the FIFO method had been used, what would the value of COGS been for the sale to UUU Co.