Wood Showcase - step two

I keept working on the showcase, trying to go forward. Thinking about the possibility that mass customization gives us I thought we can slightly change the geometry of pieces without bounce against the problems of stardard production.

The furniture is made on a skeleton of wood beams of two different geometries.

In these images are selected the two types of beams, they belong to the same family. The way I worked is to create different families for beams, panels, benches and bench structures and then I duplicate them to have different types. I did it because I wanted to have a complete abacus with the area of any element.

The problem is that I had difficulties to set up the abacus because I can't get the correct voices: I would like to have family, type, area and final cost. 

p.s.: I got a mistake thinking the dimension of the panel was 400x200 cm.. today I read it is 200x120.. the 400 cm side was the dimension I chose for the beames, trying so to think also about nesting.