Starting work on Parallel Conductor Calculator

I have begun work on a calculator that finds the amperage, OCPD, equipment grounding conductor size and voltage drop for parallel conductors No. 1/0 AWG and larger. I plan to use this calculator to build a Table for conductor sizes and OCPD's to 2000 amperes that will include the raceway sizes. Of course of even more interest is how cost effective are the different parallel configurations. I have always wanted to know which pipe and parallel configuration for a fixed load is the least expensive and would like to see a comparison chart. I may take it that far. This would require using the Means estimating book to find the labor costs, and of course the material costs vary every day with the price of copper fluctuating like it does.