I struggle to calculate the NPV problem, but I don't know why my answer always a little different from the solution.

For this question, here is my answer

Here is the solution

c. What is the project's PI? d. What is the project's IRR? 10-7. (NPV, PI, and IRR calculations) You are considering two independent projects in Birmingham and Manchester, respectively. The initial cash outlay associated with the Birmingham project is $550,000, and the initial cash outlay associated with the Manchester project is $750,000. The required rate of return on both projects is 13 percent. The expected annual free cash inflows from each project are as follows: Initial outlay Inflow year 1 Inflow year 2 Inflow year 3 Inflow year 4 Inflow year 5 Inflow year 6 BIRMINGHAM -$550,000 120,000 120,000 120,000 120,000 120,000 120,000 MANCHESTER $750,000 170,000 170,000 170,000 170,000 170,000 170,000 Calculate the NPV, PI, and IRR for each project and indicate if the project should be accepted. 10-8. (Payback period calculations) You are considering three independent projects in Nice, Naples, and Nantes, respectively. Given the following free cash flow informa- tion to the horieforb To $1,291,861.338 7- (1.13)6] 0.13 19-7 Birmingham : NPU=-$150,000 + $120,000/ - 70244.03