An apple 80

A box of milk is 250ml, 2 10 calories.

How much is a bag of biscuits? . . ? 50g small package, 220 cards, 250g large package 1200 cards.

A pear has 60 calories.

A bowl of rice is 250 calories.

If you don't know, you can't calculate the exact weight. You can compare it yourself.