A company producing sugar has several production machines. The following is data regarding the time to use machines and electric loads in 2019.

Month	Engine clock	Electrical load
January	500	IDR 2500000
February	180	IDR 1900000
March	420	IDR 2200000
April	420	IDR 2200000
May	500	IDR 2500000
June	500	IDR 2500000
July	180	IDR 1900000
August	360	IDR 2000000
September	360	IDR 2000000
October	180	IDR 1900000
November	420	IDR 2200000
December	500	IDR 2500000

Questions

If you are a financial manager, you are asked to:

1). Estimating variable electrical load per machine hour using the high-low point method

2). Estimating the fixed electricity load per month using the high-low method

3). Make a monthly electricity cost function using the high-low method

4). Estimates how much the total electrical load will be if the number of engine hours is 1200 engine hours