It's probably more useful than paying even more to learn calculus...

Grading a house is somewhat done in insurance, based on the cost to rebuild, costs of construction and age, condition of a single property and then again to the average in an area might be a better calculus. 

@Barry Wittine - That was exactly part of the calculus when I purchased it.

An economist might prove to be more beneficial as economics is a combination of statistics, calculus, and psychology.In addition to crunching out numbers for clients, I can also provide insights on their meaning, and recommend the best course of action (with respect how the economy will change, and how your portfolio will be affected).

In my calculus, though, I know I do business with people I know, like, and trust and I think that people will know, like, and trust me the most when I'm living in the way that is most in-step with who I am. 

Here is my crude calculus. 

Your question might look simple or naive but it's a calculus question that I'm not capable of figure out quickly.

You have to learn arithmetic and algebra before you take on calculus.  

ALTHOUGH pay special attention to the information on it, because even then with a database service and estimation program it will speak of refining the calculus to what's specific to the user.

Finally, experienced investors also think in terms of $Return/Headache ... if this property looks like it will be a PITA, then return expectations go up.I'd see if you can convince the investor to go through his mental calculus with you of what specifically he is looking for and what specifically the deal you are presenting is lacking.