when my eldest son started school all the parents sent some stuff for the Christmas party, sandwiches, sweets, drinks etc, my then wife sent me for 5lb apples so off I trotted to the market with a crisp clean ten pound note. I couldn't remember whether the former Mrs 4GS said "Five pound of apples" or " Five pounds worth, so, I pondered this over a cup of coffee and decided that she meant 'Five pounds' worth.
Good job I had a big car, we were eating apples for blooming days and days after that, apple for breakfast, apple and chips for lunch, apple and mince pie for dinner etc.
She never sent me shopping again though ;-))