Y X
400 3000
500 4000
600 5000
700 6000
Now you try it!
All you have to do to get the total amount is divide the meters by 10 and add 100.
The 100 is the initial fee, which is why you add it.
I know you divide by ten because in the example they gave you, 400 is the total, now, take the initial fee away to get 300, divide 3000 by 300 and you get 10.