Shopify GA4 Revenue Reconciliation: Refunds, Profit ROAS, and Budget

Use a revenue, refund, and profit operating readout plus a one-refunded-order readout to reconcile GA4 revenue with Shopify net sales, backend reconciliation paths, refund ARN, COGS, and cash timing; then use the Revenue reconciliation calculator, ROAS / Pricing tool write-back, and scale decision check to judge post-refund ROAS, profit ROAS, Max CPA, incremental contribution profit, and the cash low point while routing profit, budget, CRO, and offline-backfill work clearly.