You pick a discount. You pick the lowest gross margin you are willing to keep. PromoMath reads your live prices and cost per item from Shopify and sorts every variant into Safe, Low margin, Losing money, or Missing cost. It also shows the highest discount each variant can take and still clear your floor. Run it on all products, one collection, or a few products. Export the results to CSV. There is nothing to install or sync, and your data stays in Shopify. Requires Cost per item in Shopify.

• Enter a discount and a margin floor, see every variant sorted in seconds
• Safe, Low margin, Losing money, or Missing cost on each variant
• Max safe discount per variant, so you know how far you can actually go