Explain step by step solution for Present Value of Cash Outflow.

Oakmont Company has an opportunity to manufacture and sell a new product for a four-year period. The company's discount rate is 18%. After careful study, Oakmont estimated the following costs and revenues for the new product: When the project concludes in four years the working capital will be released for investment elsewhere within the company. Required: Calculate the net present value of this investment opportunity. (Round your final answer to the nearest whole dollar amount.)