You are tasked with evaluating the purchase of a vending machine for the snack room.

The total initial investment $($purchase$,$ modification and investment in net operating working capital$)$ will be $$6,000.$

The machine will result in operating cash flow of $$2,400$ per year for three years.

When the machine is sold at time period three the net sale price will be $$1800.$ The firm will also recover the investment in net working capital of $$451.$

What is the net present value of the investment if the required return is $12\%?$