A large retailer is considering the purchase and installation of solar collectors on the roofs of their many retail stores. For a given store, assume that the cost of acquiring and installing these collectors and energy storage units is $$2,100,000.$ Assume that the cost of energy savings is estimated to be $$125,000$ in the first year and that these savings will grow at $6\%$ per year over the $22-$year life of the collectors. Because this is a very low risk project and there are government loans to encourage this type of investment, the cost of capital is $4\mathrm{.}2\%.$ Ignoring depreciation and taxes $($until covered in chapter $8),$ the net present value of this solar energy project is