Formula feeding moms- how many oz is your one/two month old drinking?

My little one is 6 weeks old and is taking 2 ounces (60ml) every three hours.

Tell me how old your baby is, how many ounces they are drinking and how often please! Thank you so much!

She is 7lbs 8oz this week. The hard part for me is that my daughter has two heart defects and she doesn't always let us know if and when she is hungry. We just try to bottle feed and if she won't we put it through her g tube. So do I go by her weight (rule of thumb is 2-2.5oz per pound for daily intake then divide by how often baby eats or what?) Help mamas! We have an appointment with nutrition coming up but they won't help me until they've seen her at least once which I kind of understand.