FIFO keeps stock fresh and keeps lab reports current. It also makes costs accurate: each sale is charged at the cost of the batch it actually came from.
FIFO
Selling the oldest stock first, so no batch sits on the shelf until it needs retesting.
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.