Sunshine Company's manufacturing data is presented below. Week1 Week2 Week3 Week4 Machine Hrs 4,800 3,400 4,000 5,900 Repair Cost What is Sunshine Company's cost function? 6,385 4,585 5,285 7,085 Using the high-low method, calculate the following a) the variable repair cost per machine hour b) the fixed repair cost c) estimated repair cost for 4,500 machine hours