QUESTION 4: 20 marks SHOW ALL SUPPORTING CALCULATIONS FOR THIS PROBLEM. NO MARKS WILL BE AWARDED FOR ANSWERS TO THE PROBLEMS UNSUPPORTED BY CLEARLY SHOWN CALCULATIONS. Lexington Pharmaceuticals, Inc. was incorporated in the province of British Columbia on October 28, 2011. After gathering manufacturing-related costs over a period of several years, the company determined that machine hours were the best predictor of the company's maintenance costs. Allison Forsythe, the company's Chief Financial Officer, is studying the following report relating to the company's maintenance costs and machine hours usage for the twelve months of the preceding year: Month January February March April May June July August September October November December Machine Hours 4,500 5,400 6,400 5,200 4,300 4,400 6,800 4,200 7,600 6,200 5,900 6,300 Total Cost $34,645 $40,612 $47,242 $39,286 $33,319 $33,982 $49,894 $32,656 $55,198 $45,916 $43,927 $46,579 Required: Please answer the following questions using the high-low method: 1. What is the variable maintenance cost per machine hour? 5 marks 2. What is the fixed cost of maintenance each month? 5 marks 3. What is the mixed cost formula for the company's maintenance cost? 5 marks 4. If Lexington uses 4,800 machine hours in a month, what will its total maintenance cost be for that month? 5 marks