Final answer:
If an item is going on sale next week, you should tell the customer.
Step-by-step explanation:
If an item is going to go on sale next week, you should tell the customer. This is because informing the customer in advance allows them to plan their purchases and wait for the sale to get a better deal. It also builds trust and loyalty with the customer as they appreciate the transparency and honesty. By providing this information, businesses can attract more customers and increase their sales.