Gross margin shows how much of each sale is left to pay for everything else: software, marketing, wages and profit. It is the number to protect when you set discounts.
Gross margin
Revenue minus cost of goods sold, usually shown as a percentage of revenue.
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.