The freight line hides more than the carrier’s rate
A purchasing manager I worked with once signed off on a PTFE membrane filter order at $0.38 per unit, 25 mm diameter, 0.45 µm pore size. The invoice matched the quote. Nine months later, his true cost per usable filter was $0.61. The difference was not a supplier trick. It was freight allocation, a duty classification error, a failed incoming inspection lot, and a storage decision that cost him 3,200 filters. If you only compare unit prices, you are not calculating ptfe membrane filter land...
