I have the Fortran source code for a Chemistry math problem that I am trying to solve. I need someone help me compile it and add logic that will show me the numeric values at certain points in the equation.

I am a programmer of machine languages, In this case Allen Bradley ladder logic and function block. I need to write a program in machine language to solve the equation in the attached pdf. The attached pdf contains and example of a Fortran program that performs the equation that I am attempting to replicate in ladder logic. I'm good at ladder and function block, but really struggle with structured text. The main purpose of the calculation is to determine the compressibility factor(Z) of natural gas based on the composition of 21 gas’s. In a nutshell, the attached pdf, pulls constant values from tables for variable iterations of n,i,j and ij. These constants are then used to calculate the final result with numerous summations. I need someone to compile the example Fortran program at the end of the pdf document and help break it apart so that I can see the numeric values that it calculates during the in-between steps and iterations of the calculation. That way, I can compare the values that it generates to the values that my program is generating and make it easier to find what I need to fix in my program. I may also need someone to help answer questions about certain steps of how the fortran calculation is performed. The attached pdf shows the calculation and also contains sample comments in red about what I need help with. Also attached is the Fortran code in a text document. It was made by converting the pdf to a word document.