Need help making calculations (Newbie)

[Luis Molina]

Hey everyone I am new wholesaling and have a homeowner who is awaiting an offer for his property. This would be my first offer so you could imagine I am a bit nervous. Here is the breakdown:

Owner asking: $125,000
Property detail: 3/1 (1352 sq ft)
Tax assessment (2012): $45,000
Comps: approximately $44,000
Freedomsoft estimates: $62,000
Other website avg estimates: $87,000

The owner says theres just some painting that needs to get done and thats about it.

This is where I get confused because I am not sure what number to go off to begin my calculations. Would it be tax assessment? Comps? Estimates?. After I figure that out, my next step would be to

multiply by 70%, minus repairs (1352x $5), minus fee?

What ever I get is the cash offer for this homeowner?

Thanks!!