You can download all the spreadsheets and try them if you like as demo’s I believe. This will let you know if the functionality is to your expectation.
The actual excel formulas and cell references cannot be revealed as far as I can tell. You have to check the calculations using an example problem or hand calc.
Christopher Banbury, PE
President
Ark Engineering, Inc.
Phone: (352) 754-2424
Fax: (352) 754-2412