Major Hallo-Party Savings at Costco

Think you have no space for what Costco sells? Think again. True, you may not need 5 gallons of mayonnaise (and likely have nowhere to put it anyway) but if you're throwing a Halloween party, the savings found at Costco and other warehouse stores can justify the membership fee.

According to Consumer Reports, which sent out a team of 28 mystery shoppers to 130 stores in 15 states, discount stores like Target and Walmart slash prices 20 to 30 percent less than regular grocery stores. The real savings, however, are at warehouse stores like Sam's Club and Costco, where prices run a whopping 40 to 50 percent less. We did a little shopping to see how much a Costco Halloween party would cost. Take a look.