That's funny, Reminds me of a neighbor who sent her husband out of stuff for a bunt cake or something like that. She neatly numbered the list 1 through 6, which he saw clearly as quantities. 1 lb sugar, 2 doz eggs, 3 lb flour, you get the picture. In the check out line he realized that maybe he had made a mistake but was to embarrassed to say anything. The excess ended up at the food bank.
Next time call the store, tell them what you need and that you are sending your wife into pick it up.
I'll have to add this to the list of mistakes I haven't made but undoubtedly will.
Roger