Panic question pls help

Can someone pls explain why we did not have to add inflation to the calculated returns in 2008 am q1d. Computation is as followed fv=_15,000, pv=10,200,000. Pmt=-55,000.n=5–> I/Y = 8.48. I added inflation to 8.48 but wrong

The ending value of 15MM already includes the effect of inflation. See it as a “nominal” goal of the portfolio.

Plus mortgage payments aren’t indexed to inflation (level dollar amount).

awesome thanks guys