J.L.
I follow this guide from the Baby 411 book. For reference 2 Tbsp. of cereal is 1 oz, and most Stage 1 baby foods are in a 2.5oz package.
For 3-6 months: (Stage 1 pureed foods)
32-40oz/day milk
0-8oz/day food
6-9 mos: (Stage 2 foods - introduce more texture)
24-32oz milk
8-14oz/day
9-12 mos: (Stage 3 foods - bite sized pieces)
20-30oz milk
10-15oz food
My little girl is 5 1/2 months and she drinks 4-8oz bottles per day, and eats one meal of cereal (2-3oz) and a fruit or veggie in the evening (2.5oz). She's a big healthy baby!