Martin Industries, which manufactures and sells a highly successful line of summer lotions and insect repellents, has decided to diversify in order to stabilize sales throughout the year. A natural area for the company to consider is the production of winter lotions and creams to prevent dry and chapped skin. After considerable research, a winter products line has been developed. However, Martins president has decided to introduce only one of the new products for this coming winter. If the product is a success, further expansion in future years will be initiated. The product selected (called Chap-Off) is a lip balm that will be sold in a lipstick like tube. The product will be sold to wholesalers in boxes of 24 tubes for $12 per box. Because of excess capacity, no additional fixed manufacturing overhead costs will be incurred to produce the product. However, a $100,000 charge for fixed manufacturing overhead will be absorbed by the product under the companys absorption costing system. Using the estimated sales and production of 100,000 boxes of Chap-Off, the Accounting Department has developed the following cost per box: Direct material $4.00 Direct labor 2.50 Var. manufacturing overhead 1.50 Total cost $8.00 The costs above include costs for producing both the lip balm and the tube that contains it. As an alternative to making the tube, Martin has approached a supplier to discuss the possibility of purchasing the tubes for Chap-Off. The purchase price of the empty tubes from the supplier would be $1.50 per box of 24 tubes. If Martin industries accepts the purchase proposal, direct labor and variable manufacturing overhead costs per box of Chap-Off would be reduced by 15% and direct material costs would be reduced by 30%. Should Martin Industries make or buy the tubes? Show calculations to support your