Given:
initial investment of $38,000 
residual value at the end of its life of $3,000. 
useful life of the equipment is 5 years. a
additional net cash inflows of $12,000 per year for each of the five years. 
mantua motors' required rate of return is 14%. 
NPV = 12,000 * [(1-(1.14)^-5) / 0.14] – 38,000  NPV = 12,000 * [(1 – 0.519)/0.14] – 38,000 NPV = 12,000 * (0.481/0.14) – 38,000 NPV = 12,000 * 3.436 – 38,000 NPV = 41,232 – 38,000 NPV = 3,232
 We need to consider the residual value of 3,000 that the company will have at the end of 5 years. It serves as an additional cash flow, thus, we need to add its PV to the NPV. 
Present Value factor of the 3,000 is: PV Factor = 1 / (1+r)^n PV Factor = 1 / (1+0.14)^5 PV Factor = 1 / 1.925 PV Factor = 0.519 3,000 x 0.519 = 1,557 We add this to the NPV. 3,232 + 1,557 = 4,789
 The Net Present Value of the project is 4,789.