need help answering all parts !!

Cost $450,000 $690.000 $7,800 Opening inventory Gross purchases RTV Gross sales Markdowns Customer returns Retail $685.000 $1,280,000 $14,000 $987,000 $95,000 $38,000 Utilize the above figures to calculate: a. The closing book inventory at retail. (2 points) $685,000.00 + $ 1,190,00000 - 5027,000.00 - 395,000.00 - $14,000.00 b. The cumulative markup% of total merchandise handled. (3 points) c. The cost value of this closing book inventory. (2 points)