Ecommerce Margin Scenario Builder - Calculate true product net profit margins and More

Hey Product Hunt community! 👋 I'm Oliver K.G., founder of Smart Solutions Corner and maker of BizMargin. I built BizMargin because I kept seeing online sellers fall into what I call the "Revenue Vanity Trap" — hitting a $30,000 month on Shopify, Amazon, or Etsy, but checking their bank account at the end of the month and wondering where all the profit went. Most sellers calculate Gross Margin (Price - COGS) and assume they are making bank. But they miss the silent profit erosion stack: 15% platform referral fees, pick-and-pack shipping, credit card fees, return losses, and rising ad spend. BizMargin solves this in 10 seconds for 100% free with 2 main features: 1. Instant Break-Even Price & Max ACoS Finder (so you know your exact floor price before spending $1 on Meta or TikTok ads). 2. Reverse Target Margin Finder (set your goal, e.g., 35% net profit, and it calculates the exact required selling price). It’s 100% free, browser-based, with zero mandatory sign-ups. I’d love to hear your thoughts, feedback, and any features you'd like to see added! Thanks for checking it out! 🚀