> ## Documentation Index > Fetch the complete documentation index at: https://docs.fusioncore.us/llms.txt > Use this file to discover all available pages before exploring further. # Orders and Opportunities Overview > Track potential sales as Opportunities, turn them into billable Orders, add products, take and reverse payments, and apply account credit. ## What This Section Covers This section is where money actually moves in fusionCore. You track a potential sale as an **Opportunity**, convert it into a billable **Order**, add the products being sold, and then take the accounting motions on that Order — payments, refunds, adjustments, write-offs, and voids. Each motion is recorded as a **Financial Event** that your finance team can report on. If you are new here, start with **Opportunities** (or create an Order directly from an Account or Contact), then learn how products and payments work on an Order. ## Key Concepts * **Opportunity** — a potential sale (a membership renewal, sponsorship, or registration) that you can price and then convert into an Order. * **Order** — the billable transaction. You add products through the **Order Entry** screen, then take payments and other accounting motions against it. * **Financial Event** (`FCORE_PAY__Financial_Event__c`) — the per-transaction ledger record fusionCore writes for each motion (payment, refund, A/R, void, write-off, adjustment). * **Account Credit** — a stored balance you can apply as a payment method on a future Order. ## Explore the Section Track potential sales and convert them into Orders. Create Orders and take the accounting motions — pay, refund, adjust, write off, void and apply account credit. Add products to an Opportunity through the Order Entry screen before converting it. The record of what a customer bought, created when an Order is activated — and how it assigns benefits. Split an Order's balance into scheduled payments collected over time. Works for any installment-eligible product. Collect scheduled installment payments automatically against a saved payment method. ## Related Features Set up the products and prices that Orders and Opportunities sell. Business Units, GL Accounts, and Payment Types — the financial backbone Orders post against. Subscription renewals build on the Orders — and the installments and auto-charge — set up here.