387 5 Net Present Value Method 540 P2. Better Plastics' management has recently been looking at a proposal to purchase a new plastic injection-style molding machine. With the new machine, the company would not have to buy small plastic parts to use in production. The estimated useful life of the machine is 15 years, and the purchase price, including all setup charges, is $400,000. The residual value is estimated to be S40,000. The net addition to the com- pany's cash inflow as a result of the savings from making the parts is estimated to be a year. Better Plastics' management has decided on a minimum rate of return of 14 percent. (Hint: Use Tables l and 2 in Appendix A.) REQUIRED l. Using the net present value method to evaluate this capital investment, determine whether the company should purchase the machine. Support your answer. 2. If management had decided on a minimum rate of return of 16 percent, should the machine be purchased? Show computations to support your answer. Accounting Rate-of-Return and Payback Period Methods P3. aab Company is expanding its production facilities to include a new product line automotive tire rim. Tire rims can now be produced with little labor cost using