Costco:$5.79 for an 18-count, 36 oz. pack (16.1 cents/oz.) Kroger:$2.79 for a 6-count, 12 oz. pack (23.3 cents/oz.) Savings at Costco:30.9% (7.2 cents/oz.) Brent Hofacker/shutterstock Cheddar Cheese (Store Brand) Costco:$4.79 for 2 lbs. (15 cents/oz.) Kroger:$6.79 for 2 ...