Final answer:
The best suggestion for a customer unable to afford items on a wedding registry is to offer a gift card within their budget, providing a flexible and suitable gift option.
Step-by-step explanation:
When a customer comes into the store to buy a wedding gift and finds the items on the gift registry are beyond their budget, suggesting that they spend more than they can afford is not appropriate. A sensible and considerate approach would be to suggest a gift card for the amount the customer is comfortable spending. This allows the couple to put it towards an item on their registry that they desire. It is also a flexible option, ensuring that the customer maintains their budget while still offering a valuable and usable gift for the newlyweds.