Machine Hours 500 Total Electricity Costs $230 $290 540 360 $200 460 650 January February March April May June July August September October November December 730 310 500 230 750 830 $210 $260 $330 $160 $270 $140 $340 $350 $310 600 Using the high-low method, compute the variable cost of electricity per machine hour. (Round unit cost to 2 decimal places, e.g. 52.75.) Variable cost $ per machine hour Compute the total fixed cost of electricity. (Round answer to 2 decimal places, e.g. 52.75.) Fixed cost $ Represent the electricity cost function in equation form. (Round answers to 2 decimal places, e.g. 52.75.) Total cost = $ X MH + $ What is the expected electricity cost when 750 machine hours are used? (Round answer to 2 decimal places, e.g. 52.75.) Total cost $