Hi,
That's great that she is waking in the night for feeds. She's getting the hang of it. I would change the daytime routine to feeding her every 3 hours.
I have to go against the prevailing thought a little bit. 80g is great,and common enough in the first week or so when baby is sleepy, mum has had a cesarean etc, but as an ongoing thing, 80-g per week for a young baby is usually not enough and will ultimately lead to low supply. (This is different from say a 3mnth old baby - their weight slows down around that point) You will notice a few extra feeds per day sort everything out very quickly
Regards
Barb