Kellogg's Rice Krispies Treats, 60-count for $12 + $3.00 shipping

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Another good trick-or-treat alternative, this 60-count box of Kellogg's Rice Krispies Treats is $4 off the regular $15.99 price at Costco. That works out to about $0.20 per bar for the original marshmallow flavor, with 90 calories per bar. Pro tip: if you have other grocery items to purchase, you can stock up on 2-day delivery eligible products to waive the $3 shipping fee - but you'll need to spend at least $75 on eligible items, so if you don't have enough to hit that threshold, a $3 shipping