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 SchedulePurchasesSalesBalanceTransactionDescriptionQuantityAmountQuantityAmountQuantityAmountOpening Balance$$0$May $5$Purchase from AAA Co$\mathrm{.}600$$$8,400\mathrm{.}00$$May $7$Sale to SSS Co$.$$$300$$$4,200\mathrm{.}00$May $13$Sale to TTT Co$\mathrm{.}150$ $$May $15$Purchase from BBB Co$\mathrm{.}90$$$1,800\mathrm{.}00$$May $24$Sale to UUU Co$\mathrm{.}20$$May $28$Purchase from CCC Co$\mathrm{.}80$$$1,200\mathrm{.}00$b$)$ If the FIFO method had been used, what would the value of COGS been for the sale to UUU Co$.?$COGS $=$COGS $=$ $Checkc$)$ If the specific identification method had been used, what would the value of COGS been for the sale to UUU Co$.?$ Assume all the units were purchased from BBB Co$.$