3. Walters Industries manufactures a product that contains part XYZ. The company has always purchased this part from a supplier for $70 each. Walters recently upgraded its own manufacturing capabilities and now has enough excess capacity (including trained workers) to begin manufacturing the part instead of buying it. The company prepared the following per unit cost projections of making the part, assuming that overhead is allocated to the part at the normal predetermined overhead rate of 60% of direct labor cost Direct materials Direct labor Overhead (fixed and variable) 9.60 Total $52.00 16.00 577 60 The required volume of output to produce the parts will not require any incremental fixed overhead. Incremental variable overhead cost is $4.50 per part. Should Walters make or buy the parts? (3 points)