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The Present Value Discount factor is derived according the following formula:
PVfactor =     1
                     (1+R)N
Discount Factor
           Where:
  N  Year of analysis
  R  Interest Rate (IRR)
  Pvfactor  Discount Factor
Calculation of the present value of the cash flows
The Present Value Discount factor is derived according the following formula:

PVfactor =    1  .
                 (1+R)N

Where:
   N   Year of analysis
   R   Interest Rate (IRR)
   PVfactor   Present Value Discount Factor

The Annual Cash Flow multiplied by the Present Value Discount Factor results in the present value for that cash flow.  The sum of these present values must equal the Total Investment when discounted at the Required IRR, if the proper Indicated Value has been selected.

That the Total Investment is equal to the sum of the present values of each cash flow is proof that the correct Indicated Value has been selected.