Please do not use excel to show work. Please show step by step solution. Thank you!

The solution is $9748.10, but i would like to know how to get the solution!

A project has annual cash flow of $7,500 for the next 10 years and then $10,000 each year for the following 10 years. The IRR of this 20 -year project is 11.5%. If the firm's WACC is 9.5%, what is the project's NPV? Solution: Note that if IRR is used as the discount rate, PV( Costs )=PV (Benefits)