1. The problem statement, all variables and given/known data

Alternative:
immediate investment: $130,000
first-year expenditure: $6,000
the increase $2,000 and 36,000 annually.
The economic life of the project is forecast to be 12 years
Determine the rate of return of this Plan?

2. Relevant equations

PW = -130,000 + 36,000(P/A, i%, N) – G(A/G, i%, N) - 6000(P/A, i%, N)

3. The attempt at a solution

At i = 10 %
PW = -130,000 + 36,000(P/A, 10%, 12) – G(A/G, 10%, 12) - 6000(P/A, 10%, 12)

Is the PW equation right?