So we already know that 1 cup of dry dog food is equal to 120 kg.
So the dog eats 3 cups a day so that would be 360 kg a day.
And since we know there are 365 days in a year, we multiply 360 by 365 to get 131400.
So a Sdult Labrador consumes 131400 kg of dry dog food per year.
I hope this helps :)