The credit terms offered to a customer by a business firm were 2/10, n/30, which means O two sales returns can be made within 10 days of the invoice date and no returns thereafter. the customer can deduct a 2% discount if the bill is paid between the 10th and 30th day from the invoice date. the customer must pay the bill within 10 days. the customer can deduct a 2% discount if the bill is paid within 10 days of the invoice date