Donald's Engine Company manufactures part TE456 used in several of its engine models. Monthly production costs for 1,000 units are as follows: Direct materials Direct labor Variable overhead costs Fixed overhead costs Total costs 20,000 5,000 15,000 10,000 50,000 It is estimated that 10% of the fixed overhead costs assigned to TE456 will no longer be incurred if the company purchases TE456 from the outside supplier. Donald's Engine Company has the option of purchasing the part from an outside supplier at 42.50 per unit. The maximum price that Donald's Engine Company should be willing to pay the outside 3 supplier is: A. 40 per TE456 part B. 41 per TE456 part C. 49 per TE456 part D. 42.50 per TE456 part