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Required information Exercise 5A-2 (Algo) Least-Squares Regression [LO5-11] [The following information applies to the questions displayed...

Required information

Exercise 5A-2 (Algo) Least-Squares Regression [LO5-11]

[The following information applies to the questions displayed below.]

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 Rental Returns Car Wash Costs
January 2,500 $ 12,000
February 2,500 $ 13,600
March 2,800 $ 12,800
April 3,200 $ 15,800
May 3,700 $ 17,200
June 5,200 $ 25,300
July 5,600 $ 23,200
August 5,700 $ 24,700
September 4,800 $ 23,800
October 4,700 $ 24,100
November 2,300 $ 11,700
December 3,200 $ 17,700

Exercise 5A-2 Part 2 (Algo)

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.)

Solutions

Expert Solution

Month x=rental returns y = car wash costs xy X2
Jan 2,500 12,000 3,00,00,000 62,50,000
Feb 2,500 13,600 3,40,00,000 62,50,000
Mar 2800 12,800 3,58,40,000 78,40,000
April 3200 15,800 5,05,60,000 1,02,40,000
May 3700 17,200 6,36,40,000 1,36,90,000
June 5200 25,300 13,15,60,000 2,70,40,000
July 5600 23,200 12,99,20,000 3,13,60,000
Aug 5700 24,700 14,07,90,000 3,24,90,000
Sep 4800 23,800 11,42,40,000 2,30,40,000
Oct 4700 24,100 11,32,70,000 2,20,90,000
Nov 2300 11,700 2,69,10,000 52,90,000
Dec 3200 17,700 5,66,40,000 1,02,40,000
Total 46,200 2,21,900 92,73,70,000 19,58,20,000

N = number of months = 12

Variable cost per rental return =( N Σxy − Σx Σy)/{(N Σx²) − (Σx)²}

Variable cost per rental return ={( 12 × 92,73,70,000) - (46,200× 2,21,900) } / {(12 ×19,58,20,000) - (46,200)²}

On solving VC per Rental return = 4.0699 or 4.07

Fixed Cost per month = {Σy - ( Variable cost per rental return × Σx )/N

Fixed Cost per month = {2,21,900 - (4.07 × 46,200)} /12

Fixed cost Per month = 33,866/12 = 2822.17


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