Use the following to answer questions 3035 Find the missing amounts: 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 36. Inventory records for DAD Incorporated revealed the following: DAD sold 290 units of inventory during the month. Ending inventory assuming LIFO would be $