When shopping at Costco, you can check out according to the following steps:

1. After confirming that the shopping list is correct, bring the selected products to the "checkout area".

2. Hand your membership card to the clerk and place the purchased items on the checkout counter to start checkout. If the membership card is approved, the store clerk will use a scanner to scan the barcode of the product and enter relevant information, such as purchase quantity and price.

3. When all items have been scanned, the store clerk will tell you the total amount to pay. You can pay with cash, check, debit card, credit card or Costco gift card.

4. After the payment is completed, the store clerk will give you a receipt. You need to confirm that all the goods have been included in the bill and sign for confirmation. Finally, you can take your items and follow the exit instructions to leave the Costco store.