[Troy DeGroot]

Formulas were my first response, you need a custom column for the cut spacing, then another one to divide height by spacing plus width divided by spacing. This works great for square slabs, however now that you say slabs are rarely square this wouldn’t work because the width and height of the markup isn’t an accurate value when not square with the sheet. I’ve built very similar custom columns to calculate rebar, but it has it’s limitations.