The management of a design-built company is considering to buy a plotter to be used in ongoing projects so that they will not need to outsource their printing works. The machine will cost $9,000 and will save $3,200 of printing expenses annually. The useful life of the machine is 6 years, and after 6 years it will have no salvage value. The management wants a 20% return on all investments. Should the plotter be purchased according to the NPV analysis