Feeding at 6 months

Caitlyn
I'm breastfeeding my LO and she'll be 6 months next week. Not sure if I'm producing enough for her. When I'm at work for 8 hours she gets 7oz bottles around every 3 hours. I also give her 1-2 ounces of pureed fruits/vegetables a day. How much is everyone feeding their 6 month old? I've heard 1-1.5 ounces every hour and I've heard to take their weight and times it by 2.5 for how much they need in a day. Thoughts?