Please show work on how to find the total contribution per year, and the NPV. Not using Xcel

Use the following information to answer the next 2 questions: A proposed project to build handicap ramps for side-load vans requires an investment of $1,500,000, to be depreciated straight-line over a five-year life to zero. Opportunity cost is 16%. Each electric ramp will sell for $22,000, with variable costs of $14,000. Fixed cost are $300,000 per year. Sales are anticipated at 500 units for the five years, or 100 per year. Ignore taxes