In the table below there are missing figures. GHC 1,000 (1,200) 5,000 8,000 (d) Opening inventory Closing inventory Purchases Sales Cost of sales Gross profit Gross profit as a percentage of sales Gross profit as a percentage of cost GHC 2,000 (1,500) 8,700 15,000 (e) GHC 1,000 (500) (b) GHC (a) (2.000) 15,000 20,000 (vi) 5,000 8,000 (1) (m) (k) 25% 33.3%