Methodology
Formula & assumptions
Net front run
exposed base-cabinet run − excluded appliance/open zones
Do not buy finish for zones that will not receive it.
Installed run
net front run + measured side returns
Add exposed cabinet-end returns explicitly.
Purchase target
installed run × (1 + cut allowance)
Reserve stays separate from measured cabinet frontage.
Pieces to buy
round target ÷ stock piece length up
Use the actual sold toe-kick or trim length.