please help on #5 balance amount.

also question b and c

a) Fall 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 baxes. Reund all ankwers to 2 decimal places. When calculating the unit cost round to 2 decimal places as well. b) if the fIFO method had been used what would the value of cOGS been for the sale to UUU Co.7 c) if the specific identification method had been ased what would the value of cOGS been for the sale to UUU col? Assume all the units were purchased from Bbe co