A machine will increase cash flow by $311,000 per year, be obsolete 10 years from today, and is currently priced at $1,680,000. The cost will decline by $106,000 per year until it reaches $1,150,000, where it will remain. The required return is 13 percent, calculate the NPV if you purchase the machine today._______ If your required return is 13 percent, calculate the NPV if you wait to purchase the machine until the indicated year. yr. 1_____2____3____4____5____6____ When should the machine be purchased and why?

Negative amounts should be indicated by a minus sign. Do not round calculations. Please show steps & explain, I want to understand how to do the problem.