In each case below, till in the missing amount.
1. Work in Process, September 1 .............. 9,000 tons
Units started during September.............. ?
Units completed during September ............. 19,000 tons
Work in process, September ............... 30 2,000 tons
2. Work in process, February 1 .............. 13,000 kilograms
Units started during February ................ 1,500 kilograms
Units. completed during February ............ 9,200 kilograms
Work in process. February 28 ................ ?
3. Work in process. January 1 .............. 100,000 gallons
Units started during the year ............... 850,000 gallons
Units completed during the year ............. ?
Work in process, December 31 ............... 200,000 gallons