Two batches at the same supplier price can have very different landed costs once freight, customs, lab testing and payment fees are added. Pricing from supplier price alone overstates your margin.
Landed cost
The full cost of stock once it is on your shelf: supplier price plus shipping, duties, testing and fees.
See it running on your own catalog
Purity does the work these terms describe: batches held until their lab report is in, payments matched to orders, and wording checked before it sends.