Show how much earnings are made after a chopping session

After a user is done chopping and press stop, salad should say how much was earned during that session .

You can actually already do that!

If you go on the graph, you can click a bar and then move your cursor to select the others.
This will show the accumulated earnings and time for that period!

In this example, you can see that in the selected time I earned $0.45.

Hope this is what you were looking for!