Quick start: from empty to profitable in four steps

1. Check your channel fees (Channels tab). The app ships with published fee schedules for Shopify, eBay, and TCGplayer — verify them against your own seller dashboards. Shipping assumptions aren't entered by hand: each channel's average shipping charged and label cost are derived from your actual orders (seed values cover a brand-new channel). Every price the app suggests flows from these numbers.
2. Add a product (Products tab), or skip ahead — products can also be created inline while entering a purchase order, or in bulk from an order-CSV import.
3. Record a purchase order (Purchase Orders tab): the invoice lines in the supplier's currency, plus the total USD your bank actually debited (wire + fees). The app computes true landed cost per unit from your real money movement — no exchange-rate guessing.
4. Record sales (Sales tab) or import them (Import tab). The app tracks remaining stock, blended cost, realized profit — and blocks accidental below-cost sales.

From there, the Overview tab answers the big questions: capital tied up, realized profit over time, and where the money sits.