thanks for picking this up
good luck translator, because this manga has a lot of text and subtext
(I just reread the previous chapters because I don't remember anything, good thing there are just 8 chapters)
btw, if you mean "though stuff" in the credits refer to the bottom bubble on page 4 with "a receipt" in it ,
basically he said something along the lines of "balance with the ingredients she have bought",
so I think the better translation would be something like "maybe she needs to use up/finish the (leftover) ingredients that have already been bought"