Royal George Company uses the gross profit method to estimate ending inventory and cost of goods sold when preparing monthly financial statements required by its bank. Inventory on hand at the end of October was $58,500. The following information for the month of November was available from company records:

please explain : why we need use "net sales * gross profit ratio" instead of "gross profit * gross profit ratio" ?

Royal George Company uses the gross profit method to estimate ending inventory and cost of goods sold when preparing monthly financial statements required by its bank. Inventory on hand at the end of October was $58,500. The following information for the month of November was available from company records: S Purchases 110,000 Freight in 3,000 Sales 180,000 5,000 Sales returns 4,000 Purchases returns In addition, the controller is aware of $8,000 of inventory that was stolen during November from one of the company's warehouses. Required: 1. Calculate the estimated inventory at the end of November, assuming a gross profit ratio of 40%. 2. Calculate the estimated inventory at the end of November, assuming a markup on cost of 100%