The source of information for Sales Returns to be entered in the Sales ledger control account is: 1 Done Sales Returns Journal Sales Journal General Journal Purchase Returns Journal Gross Profit is calculated as: > Done Net Purchases - Cost Goods Sold Net Purchases - Cost of Goods Purchased Net Sales - Cost of Goods Purchased Net Sales - Cost of Goods Sold The source of information for discount allowed to be entered in the Sales ledger control account is: Done Sales Day Book Cash Book Journal Sales Returns Day Book