A piece of new equipment has been proposed by engineers to increase the productivity of a certain manual welding operation. The investment cost is $22,130, and the equipment will have a market value of $5,000 at the end of a study period of five years. Increased productivity attributable to the equipment will amount to $8,000 per year after extra operating costs have been subtracted from the revenue generated by the additional production. If the firm's MARR is 20% per year, compute the PW for this investment.
(HINT: skip $ and comma symbols)