Sample calculation for wall stability

I am looking for an experienced engineer or designer who can assist me with developing a sample calculation using Mathcad for retaining wall stability utilizing AREMA code. Although I have a rough idea of what I want, I do not have specific design parameters or measurements for the wall. The wall will be made of concrete blocks, supporting soil with two railway tracks on top.

Skills and Experience:
- Strong background in MathCAD spreadsheet
- Experience with stability calculations for retaining walls using AREMA and the trial wedge method
- Ability to provide accurate and reliable calculation templates for design purposes.