AN ATLAS CHAPTER
Price & mass
Net pounds are not fluid volume or box coverage
Use declared bag mass without inventing density or service coverage.
One bag and a multi-bag bundle need different denominators
Count bags and total declared net mass exactly once.
Cost per pound is a merchandise comparison, not cost per day
Keep the original pack price and net mass when rounding.
A first-order offer is not a permanent bag price or price history
Keep buy-once prices, list prices and conditional plans separate.