Insurance President's salary e) 4. What methods can you use to separate fixed cost from variable cost in a mixed cost item? Which method is more accurate? Why? 5. The number of X-rays taken and X-rays costs over the last 9 months in Alpha Clinic are shown below: Month X-ray X-ray Taken Cost (In thousands) Jan P 6,250 P 28 Feb. 7,000 29 Mar. 5,000 23 April 4,250 20 May 4,500 22 June 3,000 17. July 3,750 18 Ang 5,500 24 Sept 5.750 26 P 45.000 P 207 a) Using the Least-Squares Method, determine the formula for X-ray cost. b) What will be the X-ray cost if a) 4,600 X-rays were to be taken in October? b)4,750 X-rays in November? c)4,800 X-rays in December