You can make an investment that will immediately cost \\( \\$ 52,000 \\). If you make the investment, your after-tax operating profit will be \\( \\$ 13,000 \\) per year for five years. After the five years, the profit will be zero, and the scrap value also will be zero. You will finance the investment with internally generated funds and receive the profit at the end of each year. The net present value equation for this investment is: \\[ N P V=\\$ \\sum_{\\mathrm{j}=} \\] (Carefully enter your answer as an algebraic expression, using the proper notation in the proper format. Do not use the letter \\( x \\) to denote the multiplication sign.)