This is my question, please solve it. Thanks!

The Cheyenne Hotel in Big Sky, Montana, has accumulated records of the total electrical costs of the hotel and the number of occupancy-days over the year 2020. An occupancy-day represents a room rented out for one day. The hotel's business is highly seasonal, with peaks occurring during the ski season and in the summer. Electrical Month Occupancy-Days Costs January . ... .. . 1,736 $4.127 February . . . . . . . . . . 1,904 $4,207 March...... ... ... 2,356 $5,083 April. . . . . 18 1 1 1 1 14 960 $2,857 May 360 $1,87 1 June . . . . . . . . . . 744 $2,696 July......... . 2,108 $4,670 August..... .. . .1. 2,406 $5,148 September . . . . . . . 840 $2,691 October. . . . . . . . . . . 124 $1,588 November. .. . . . . . . 720 $2,454 December . . . . . . . . . 1,364 $3,529 Required: a) Using the high-low method, estimate the fixed cost of electricity per month and the variable cost of electricity per occupancy-day. Round off the fixed cost to the nearest whole dollar and the variable cost to the 4 digits after decimal. b) If number of days in the first quarter of next year 2021 are estimated as follows, then calculate total electrical cost for first quarter. January 1,650 days February 954 days April 2,700 days c) What other factors other than occupancy-days are likely to affect the variation in electrical costs from month to month