Formula and 9 month olds.!

I have a question ladies! About how many cans of formula do you go through with a 9 month old? Just wondering if I should give more solids than I’ve been doing! I started my baby on baby foods at 6 months and slowly introducing more solid but still baby safe foods. My little girl only has her 2 bottom teeth so not able to really bite food well yet so I try to keep away from rice and like whole beans. I go through about 8-9cans of enfamil a month the small ones so just wondering if that’s too much or Too little?? Just want to hear other mommies inputs! I’m a first time mom but pregnant with my second so just seeking some advice regarding the introducing solids and lessening the formula! Thanks so much in advance!