D.P.
Maybe try a meal of solids and a small 2-3 oz. bottle, and the next meal give her all formula, etc. alternate. You're probably already doing this but make her cereal with formula. You might want to prepare a pitcher of the entire amount of formula she theoretically should have in a day and then try to get it mostly gone by the days end. This is an accurate way of seeing exactly how much she IS getting overall--all day. I wouldn't stress too much if it fluctuates from day to day--babies will get what they need as long as it's being offered. Good luck!