Salmon Treats wants to upgrade their canning conveyor belt at a cost of $288,000.$ Their old one will be donated to a local technical school. The new belt system is expected to have a four year life and be sold for $$16000$ at the end of its useful life. The belt is expected to lower costs by $$48,000$ each year as well as increase production and sales by $$52,000$ each year. Their working capital is not expected to change much. The required rate of return is $6\%.$ What is the net present value of this investment?