Roberts Air Conditioning Heating Company performs air conditioner repair service. During July, its busiest month, Roberts had repair labor hours of...

Roberts Air Conditioning & Heating Company performs air conditioner repair service. During July, its busiest month, Roberts had repair labor hours of 60,000 and total costs of $840,000. During December, its slowest month, Roberts had labor hours of 20,000 and total costs of $480,000. Use this information to determine Roberts' total monthly fixed costs. (Round any total dollar value to the nearest whole dollar & enter as whole dollars only. Round any unit dollar value to the nearest penny & enter with both dollar(s) & cents. Round any unit non-dollar decimal numbers to the next higher whole number and enter as a whole number.)