if you read pre-announcement PR it went up as percentage of sales . if u then compare to previous Q3 as they will report identical sales (with 60 more stores added) then u see food cost is up by ~$8 Mil during the quarter or around 2.5% increase from Q to Q.
of course u may analyse their meat, cheese, grains, etc. increases separately to get a better earnings numbers, , but their top line seems to be weakening regardless.
i am amazed such simple game here and all last season players walked away to kill themselves on amazon