salam

i bought tomato paste cans carton with below details

cans = 100
every can contains = 70 gms
the price of the carton is = 75

this is the first number,

now for the second number,

cans = 48
every can contains = 135 gms
the price of the carton = 53.70


the question is that what is the difference in the price of the both cartons???

explain with details
and also write the formula