Combo Feeding

I pump 20 oz a day no matter what and have since about 6 weeks pp. she’s almost 4 months and we supplement with 5ish oz of formula a day.

I consider myself a just enougher because even when we didn’t supplement she was gaining weight, but I also nursed so I never really knew what she was getting. Then I was pumping entire days just to see and realized I was just shy of her recommended intake and started adding a formula bottle a day to be safe. I like being a just enougher as I have no interest in a freezer stash.

However, I just went back to work and I can’t get ahead for the next day and it’s frustrating. I wish I made 5-10 more oz a day. What I pump in the morning is basically a bottle and a half for the whole time I’m gone. She’s taking more formula while I’m at work and I’m feeling let down. I have no problem with formula but looking for some positive insight that combo feeding is still a win.