In each case below, fill in the missing amount. 1. Work in process, September 1 Units started during September Units completed during September Work in process, September 30 10,000 tons 10,000 tons 20,000 tons 3,000 tons 2. Work in process, February 1 Units started during February Units completed during February Work in process, February 28 13,900 kilograms 1,700 kilograms 7,600 kilograms 4,600 kilograms 3. Work in process, January 1 Units started during the year Units completed during the year Work in process, December 31 90,000 gallons 815,000 gallons 27,600 gallons 175,000 gallons