How many ounces of formula

Noleen • Married summer 2015
How many ounces does your 4 month baby take in 24hrs? 
My baby girl feeds 5 times a day and usually 5 ounces each time. I've started trying her with 6 on a couple of the feeds but she's not really interested and I was worried 25-27 ounces was too little at this age x