How much should an almost 7-month old baby be eating?

I know each baby is different but i just wanted to see how much the average almost 7-month old baby eats. she takes in around 24 oz of pumped milk, 2 containers of the gerber first foods, and about 2 oz of rice cereal/otmeal in the morning. she is my second girl, and my first is so picky and thin, so i want to do everything i can to have my baby be healthy this time around. although the doc says it is probably in the genes that my daughters are small, i just can't help but be a worried mom. serious answers please.