I'm working on estimating the center of gravity of armor for ships

Within the framework of my program for warship general design, I'm presently working on estimating the center of gravity for my "generic" ship. For specific ship, some of the factors drop out, as they have a zero coefficient. I will factor in the armor CG to my metacentric height (GM)calculation based on what is William Hovgaard's book, The General Design of Warships (pages 80 to 100). There is an equation for estimating GM that I have mechanized in my program (equation 20, the Stability Equation).