Tony and Steve are considering whether to purchase a new "bending brake." This machine puts precise bends in a material used in their vinyl siding business. The machine will cost $70,000. Tony and Steve estimate that the machine will generate profits as? follows: $20,000 in its first year, $15,000 in years 2, 3, and? 4, $10,000 in years 5 and 6. They believe the machine will have no value after year 6.
a) If they believe they can make 11 percent on their money in other investments of similar risk, they should not or should purchase the machine since the net present value is $
(round your response to the nearest whole number and include a minus sign if necessary).