12/2/10
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If you see an organic food item or eco-friendly cleaning supply on sale, how many should you buy without buying too many? If it's something you use on a regular basis and you know you're saving money, then stock up on about 12 weeks' worth of product. This is the average length of time in between sales cycles for most items found in a supermarket. So if you eat one jar of organic pasta sauce a week, then on average, you should buy 12 jars.