They’re celebrating a big sales month, excited about revenue growth — and then we look at the actual profit numbers and the excitement falls. We discover they’ve been pushing products that look like bestsellers but are actually losing money once you factor in all the costs.

Do you know which of your products actually makes money? Not which one sells the most — which one, after COGS, platform fees, ad spend, fulfillment, and returns, actually puts profit in your pocket? Most sellers don’t know. And that gap between assumed profitability and actual profitability is often where the cash disappears.