ABC Inc. produces a single product and has a manufacturing capacity of up to 15,000 units per year. Production cost data for ABC's last two months of operation were as follows: Production in units: Production costs incurred: Using the high-low method, calculate ABC's monthly fixed costs. Multiple Choice O O O O $6,000 $8,000 $38,000 November December 6,000 8,000 $ 20,000 $ 24,000 Cannot be determined.