Pamela hafer and her friend or planning to host a party. pamela offered to purchase the potato chips and dip. she can buy a 12 ounce bag for 2.50 with 1.00 off coupon and 15 owns bag for $1.75 with no coupon or 22 ounce bag for $3.79 with a 0.75 off coupon. the sale tax is 5.5% based on the unit price per ounce what size is the best buy