A DRAWER DIVIDER
Pack arithmetic
Pairs, pieces and tights garments are different counting units
Write the unit before multiplying a pack count.
Price per pair is not price per wear or a durability result
Normalize actual purchase quantities without inventing lifetime use.
Plan whole packs from a chosen matching-stock target
A stock target is a user assumption, not a clothing or growth prescription.
A drawer inventory is not a growth or replacement schedule
Keep actual matching pairs separate from assumptions about future needs.