THE REFERENCE SHELF
Box counts & price
Count boxes and individual bars separately
A case, box and wrapped bar are different packaging levels.
Divide by actual bars, not carton size
The per-bar ratio is a quantity comparison, not a taste or health ranking.
Single-bar and box offers need a common cost scope
A convenient single wrapper can have a different per-bar amount than a larger carton.
Calculate carton food mass from the actual bar count
Net food mass excludes the carton and individual wrapper weight.
Three dated US boxes, with mass and protein units
Keep count, per-bar mass and labeled protein in separate columns.