Aah, memang formula milk pricing is so tough on the budget, kan! I understand your concern, Lactogen memang some babies' tummies tak agree with it. Honestly, you might want to try Friso or Dumex Mamil Gold (usually around that price range), but since your little one dah kena cirit-birit with the switch, I'd suggest checking with your pediatrician first to make sure it's just the formula and not something else, then they can recommend what might suit your baby better. Hopefully you'll find something that works for both his tummy and your wallet soon!