How many ounces did your 5 month old eat?

My son will be 5 months old on Wednesday. I just went back to work about 3 weeks ago. So I was home exclusively breastfeeding. Now that I'm back to work I only work the weekends. So I give him formula while I'm away. But today I'm not sure if he's had enough because I had to breastfeed after giving him his bottle. When I was pumping I gave him just 4 oz. Now I give formula so it's you know 4oz water 2 scoops of formula so it makes around 5 oz maybe but that wasn't enough...

Just didn't have this situation with my first because she was on a strict diet and feeding schedule with a feeding tube.