Battered and bruised

Yesterday, my wife accidentally dropped a wheelbarrow and broke one of the metatarsals in her right foot. I am still recovering from breaking the big toe on my right foot. Between the two of us, we do not have a working set of legs. I went to get crutches for my wife this afternoon and misread the shelf tag. Turns out that the crutches are buy one set, and get another set at 50% off. What??