Good question - mostly I guess no as they sometimes seem intent not to refill until other levels drop too.

Mostly this averages well enough. Yet for a few things - like tikka where ratios seem consistently wrong. As Britain's favourite curry, you'd expect a few extra jars of that in every box. Or Cumberland sausages up here in former Cumberland - just forget about whatever the other things in the box are. :)

Probably means going the other way that when they drop something there's a chance 1 of the 2 or 3 actually sold well.