Here I'm trying to find out the how part on this! I know the answer is $69,321.93.

Here's the question:

A lathing machine would generate an additional $15,000 per year in profits at the end of each year for 10 years. The machine would also be sold at the end of the of the 10th year for $10,000.

But what gets me is it's asking what would be the fair price to pay for this machine today, if money is worth 18% compounded semiannually.