I only give breast milk to my little one for the first 2 months before switching to formula. My baby drinks friso, which costs $47 frm NTUC or $44.80 frm medical hall. It depends on how much your baby can drink. For me, my baby drinks a lot. So one can of friso 1 probably lasted me 7-8 days.
As for diapers, I am using mammy poko. For the first 2 months, he poop a lot due to breast milk. One day can use up to 8-9 diapers. After switching to fm, less poop. So one day I probably use 6-7 diapers in order to prevent nappy rash.
My baby goes to polyclinic for vaccination. Most of the vaccine is free except pneumococcal. Can pay through Medisave. I only visited my pediatrician 2-3 times for the past 6 months. First time visitation is about $90 and subsequent is $60.
Other money are spent on rattle toys, pram, clothes (mainly socks).