The credit terms, 2/15, n/30, indicate that a: fifteen percent discount can be deducted if the invoice is paid within two days following the date of sale. two percent discount can be deducted for a period up to thirty days following the date of sale. two percent discount can be deducted if the invoice is paid before the fifteenth day following the date of the sale. two percent discount can be deducted if the invoice is paid after the fifteenth day following the sale, but before the thirtieth day.