Food in the US cheaper than India

Look at that picture! Milk is so much cheaper here in the US. In India milk is now Rs 30 a litre and I wondered how the poor manage in our country straight away. Even chicken is way cheaper than India over here and I am really surprised. Fruit which I live on is also quite reasonable and I literally live on apples and pears. Why is food so expensive in India I wonder? It really is hard for me to understand.