Consider two devices. Device $"$A$"$ costs $$1,000,$ lasts $2$ years, costs and gives you a cash flow of $$100/$mo$.$ Device $"$B$"$ also costs $$1,000,$ lasts $3$ years and gives a cash flow of $$80/$month$.$ Assume a discount rate of $12\%/$yr$,$ nominal.

Device $"$A$"$ has an SPP of type your answer... months, and a NPV $($to the nearest dollar, express as $$5,678)$ of type your answer...

Device $"$B$"$ has a SPP of type your answer... months and a NPV $($to the nearest dollar, express as $$5,678)$ of type your answer...

I recommend Device type your answer...