What the office already has in — and what it's down to the last of.
Everything on this shelf goes to the recipe every week, automatically. Nobody signs it up and nobody brings it again: the dish is picked to put it to use, so a shelf that says what is actually there is worth more to the pot than anything else on this site.
Check it before you buy anything. That is the whole reason it has an address of its own — this office does not need a fourth jar of smoked paprika.