why LCOE vary with PPA price? and Why is IRR result NAN?

Hi,
I did a parametric analysis using SM, NFS (nos of field subsections), PPA price,and TES. a summary of the results are attached herewith. My understanding is, if the NFS, SM, and TES are not changed, the LCOE cannot be changed. am I correct? but according to the results, it changes when the PPA price changes. Please give me the reason/s. this can happen due to involving of many iterations. is that the reason?
Other thing is why is IRR result show NAN (not a number) result (please see cell no-30:O)?

Thank you,

Hello,

Please see my response to your last question on the other post:

sam.nrel.gov/node/73147

Best regards,
Paul.