Bargain Rental Car offers rental cars in an off-airport location near a major tourist destination in California. Management would like to better understand the variable and fixed portions of its car washing costs. The company operates its own car wash facility in which each rental car that is returned is thoroughly cleaned before being released for rental to another customer. Management believes that the variable portion of its car washing costs relates to the number of rental returns Accordingly, the following data have been compiled Month January February March April May Tune Rental Returns CarWash Costs 2,400 2,500 2,700 3,000 3,600 5,000 5,500 5, 400 4,700 3,900 2,200 2,700 10,700 13,000 $ 11,500 $13,800 15,900 $ 22,700 $ 21,900 $ 21,400 $ 22,500 $ 20,200 $10,400 13,200 August September October November December Exercise 6A-2 Part 2 2. Using least-squares regression, estimate the variable cost per rental return and the monthly fixed cost incurred to wash cars. (Round our Fixed cost to the nearest whole dollar amount and the Variable cost per unit to 2 decimal places.) Fixed cost per month Variable cost per rental return