Final answer:
The store should refuse the return since the price tag is missing. However, the store could offer the customer a store credit instead of a refund.
Step-by-step explanation:
The store should refuse the return since the price tag is missing. According to the return policy, the customer has 10 days to return the item with the price tag still attached. Since the customer is returning the item 1 month after the specified return period and without the price tag, the store is not obligated to accept the return.
However, the store could offer the customer a store credit instead of a refund as a gesture of goodwill. This would allow the customer to use the store credit towards a future purchase.