Here's my dilemma:

Part 1:
I need to figure square footage of brick, block, and stone. That's the easy part.
I also need to figure out quantity of each. The problem is, the factor I need to divide the area by is different for each one. So, how do I create a parameter (or parameters) for each one? I can't just say material: area *5, because that only works for brick, not block or stone. I can't just do 3 parameters, because I'll have wrong values mixed in with correct one. I'll also have different cost for each one, but I think I can just create a few different cost parameters, one for each type of material.

I know I can do a separate schedule for each, but I'd like to keep it all in one schedule. I know there's a way to do this, I just can't wrap my brain around it.

Part 2:
Is there anyway to make a formula for block corners? I was thinking I could take the wall height / 8", then multiply it by the number of corners I have (4 for a rectangular building, for example). Then, subtract that from the total area. But, there isn't a height parameter in the material take offs for walls, just width and length. :crazy:

Any ideas?