STEP-BY-STEP ANSWER:
Step 1: Identify the sale transaction at the moment when the customer makes the purchase.
Step 2: Confirm that the transaction is complete, and inventory has been delivered.
Step 3: Record the revenue immediately as the sale occurs since the earnings process is complete.
Final Answer: Revenue is recognized at the exact point when the sale is made, provided the earnings process is complete and all conditions for recognition are met.