Here’s a puzzle: if a company adds more of an item to a package and advertises that you “get X items” or get X ounces free,” don’t they have to keep the price the same? Well, no. I suppose not. Reader Scott found this fascinating example of fuzzy math on various packs of undershirts at Walmart.
He writes:
I was in to purchase undershirts for work when I stumbled on an interesting fact. Wal-mart has a pack of 6 for 13.96 and then another pack that says 2 free shirts but is charging 4.50 more. What is the purpose of saying free when in fact it is not?
Let’s see. The package of six undershirts was “originally” (though I have my doubts) a five-pack. The eight-pack was a six-pack. Let’s break it down.
$13.96 divided by 5 shirts = $2.79 per shirt
$13.96 divided by 6 shirts = $2.32 per shirt
Meanwhile, the six-pack with two free, or eight-pack, technically offers the best deal, but not by much.
$18.46 divided by 6 shirts = $3.07 per shirt
$18.46 divided by 8 shirts = $2.30 per shirt
via Consumerist http://consumerist.com/2013/09/24/hanes-throws-in-2-underhirts-for-free-charges-more-for-them/
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