Gross profit ratio = (Gross profit)/Sales x 100
Sales = Sales – Sales returns
= Rs. 6,50,000 – Rs. 50,000
= Rs. 6,00,000
Gross profit = Sales – Cost of goods sold
= Rs. 6,00,000 – 4,80,000
= Rs. 1,20,000
Gross profit ratio = 1,20,000/6,00,000 x 100
= 20%