Inside my coupon folder, I keep a small calculator. I use this calculator whenever I do my grocery shopping. I use it to determine the price of an item when there is a certain percentage off. And, I use it to compare prices.
When I compare prices, I look at the quantity of the product in the package. Using the ounces on the product, I can determine the cost of that item per ounce. Then, I select another similar item. Using my calculator, I can figure out how much I would be paying per ounce. Here is an example:
Dannon Light and Fit Yogurt 32 ounces: $2.34 each = $0.07 per ounce
Dannon Light and Fit Yogurt 6 ounces: $0.60 each = $0.10 per ounce
Based on my math above, it is cheaper per ounce for me to buy the larger yogurt. I should buy one large yogurt container rather than 6 individual yogurt containers. You should do this comparing two similar brands too (Jiff vs. Skippy peanut butter).
