Matt owns a machine shop. In reviewing his utility bill for the last 12 months he found that his highest bill of $2, 800 occurred in August when his machines worked 1, 400 machine hours. His lowest utility bill of $2, 600 occurred in December when his machines worked 900 machine hours. Calculate (a) the variable rate per machine hour and (b) Matt's total fixed utility cost. (a) Calculate the variable rate per machine hour, using the high-low method. (Round your answer to the nearest cent.) Variable cost per unit (b) Calculate the total fixed cost. Total fixed cost