In a fit of sleeplessness, I discovered the solution to my money
exchange problems! I created a MoneyExchange object that finds the value
of a sum of money with an integrative approach. Values of money is now
found with the formula f(x) = B*x/(A + x) where A is denomFrom and B is
denomTo. This prevents speculative hacking, and all sorts of exchange
problems where values were not bound by asymptotes.