One should not always assume that an advertised sale price is the best deal. One of the convenience items I wanted to pick up was frozen french fries. This is something that W can put in the oven and help make dinner or supper prep easier. The grocery store offered bags of frozen fries for $2. I originally planned to purchase two bags for $4.
I had already put them in my cart when I decided to check the price on the larger bag. I noted that I was getting 64 ounces for $4 with the sale item. The larger bag of fries was 80 ounces and cost $3.99. If I had not taken a few seconds to compare prices I would have essentially given away a pound of fries.
I do realize that the whole potatoes I also purchased will make cheaper fries, and I do plan to use those for baked potato wedges. The frozen fries are a convenient alternative. Remember just because something is on sale does not make it the best deal!