Use the following to answer questions 30-35 Find the missing amounts: Case 3 Case 1 $800,000 Case 2 $750,000 395,000 Net Sales COGS Gross profit Operating expense Operating income 400,000 295,000 350,000 215,000 290,000 80,000 30. $ For case 1, determine cost of goods sold 31. $ For case 1, determine operating income (include "_" if needed) 32. $ For case 2, determine gross profit 33. $ For case 2, determine operating income (include "-" if needed) 34. $ For case 3, determine net sales 35. $ _For case 3, determine operating expense