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 companys maintenance costs. Allison Forsythe, the companys Chief Financial Officer, is studying the following report relating to the companys maintenance costs and machine hours usage for the twelve months of the preceding year:

Month	Machine Hours	Total Cost
January	4,500	$34,645
February	5,400	$40,612
March	6,400	$47,242
April	5,200	$39,286
May	4,300	$33,319
June	4,400	$33,982
July	6,800	$49,894
August	4,200	$32,656
September	7,600	$55,198
October	6,200	$45,916
November	5,900	$43,927
December	6,300	$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 companys 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