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: Car Wash Rental Month January Returns Costs 2,400 $ 11,200 February 2,500 $ 13,200 March 2,800. $ 12,000 April 3,000 $ 14,600 May 3,700 $ 16,400 June 5,100 $ 23,700 July 5,500 $ 22,400 August 5,500 $ 22,700 September 4,700 $ 23,000 October 4,100 $ 21,700 November December 2,200 2,900 10,900 $ 14,900 2. Using least-squares regression, estimate the variable cost per rental return and the monthly fixed cost incurred to wash cars. (Round 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