coris dog house is considering the installation of a new computerized pressure cooker for hot dogs. the cooker will increase sales by 8000 per year and will cut annual operating costs by 14,100. the system will cost 48600 to purchase and install. this system is expected to have a 6-year life and will be depreciated to zero using straight-line depreciation and have no salvage value. the tax rate is 35 percent and the required return is 11.6 percent. what is the NPV of purchasing the pressure cooker?