The reports the following income statement results: Sales Operating expense Net income Sales returns & allowances Gross profit Interest expense $800,000 275,000 99,000 7,000 400,000 10,000 34. $ _Calculate Net sales: 35. $ Calculate Cost of Goods Sold 36. $ Calculate operating income 37. $ Calculate Income before Income tax (IBT) 38. %. Calculate the gross profit margin (one decimal place) 39. %. Calculate the net profit margin (one decimal place)