What would be the net present value of a microwave oven that costs $159 and will save

Question:

What would be the of a microwave oven that costs $159 and will save you $68 a year in time and food away from home? Assume an average return on your savings of 4 percent for five years.
Net Present Value
What is NPV? The net present value is an important tool for capital budgeting decision to assess that an investment in a project is worthwhile or not? The net present value of a project is calculated before taking up the investment decision at...