Formula Feeding Gaano Kadalas

For 3 month old baby, I have read na kaya nila around4-6 ounces of formula milk and frequency is every after 3-4 hours pero si baby ko around 3-4 ounces lang kaya and hindi rin po every 3-4 hours frequency. Mejo tumatagal pa minsan. Normal po ba na hindi matakaw ? Okay pa rin naman po timbang nya and hindi sya payatot. Nagpoo poop rin po daily.