Toy Manufacturing Company accumulates the following data concerning a mixed cost, using units produced as the activit Units Produced Total Cost March 10,800 $17,000 April 9,240 17,650 May 11,400 18,710 June 8,750 14,841 July 9,900 17,300 a) Calculate the variable cost per unit using the high-low method. (Round variable cost per unit to 2 decimal p. 12.25.) b) Calculate the fixed cost element using the high-low method.