Q 23.22: Natalie received a report from the production and purchasing departments with the following values for October Actual materials quantity: 18,000 pounds Total actual cost: $8,700 Standard materials quantity: 1.05 pounds/unit Standard price: $0.50/pound Units made: 16,000 Four days later, Natalie received a correction from the production department that they found an error in their calculations, and they actually only used 17,800 pounds of raw materials. How much would Natalie's materials quantity variance change for the month of October? A $500 F $100 F