for problems 1-4 , fill in the missing amount : 1.work in process inventory, february 1 = 80,000 units work in process inventory, february 28 =? units started during february =60,000 units completed during february =75,000 2. work in process inventory, june 1 = ? work in process inventory, june 30 = 55,000 gallons units started during june = 75,000 gallons units completed during june= 83,000 gallons 3.work in process inventory, september 1 = 5,500 tons work in process inventory, september 30 = 3,400 tons units started during september = ? units completed during september = 7,300 tons 4. work in process inventory,november 1 = 45,000 units work in process inventory, november 30 = 23,000 units units started during november = 57,000 units units completed during november =