Petrol and Milk Compared to Sprite

This week we had a maths problem to solve Mrs. Anderson gave us this problem to solve because when she was in Chicago she found this and told us to do it. The first thing we did was pick a car l was working with Angela and Joel and we picked a Range Rover for this we had to see which was cheaper to fill a Range Rover with milk, sprite or petrol? Why? How do you know? What type of maths did you use to solve this? and Think of the price, size, and liters. Joel was working on the Milk the first thing she did was try and find out how much it would be per liter and see how many capacities there would be. After that l  was working on the Sprite the first thing l did was try and find out how much it would be per liter and see how many capacities there would be and Angela did the same put with the Fuel which was the Petrol. The last thing we did was share it with the class and see if we were right or wrong our teacher Mrs. Anderson said we did a great job with this problem and we had a great google drawing. We added in the question and some images of sprite, milk, and Fuel.