Americano $2.45 (Your credit is $3.52)

Only the customization options are active in this state. All other buttons are disabled.

In this alternative concept the Extra options work in a different way: the user can select or deselect one or more of them directly. Overall it looks simpler, but it actually might be harder to understand at a glance.

Pros: less Extra buttons, no repetitions

Extra buttons work in a different way vs the ones just above them. This is highlighted by their different shape, but this solution might not be enough to clarify this different behavior to the user (or it might even be more confusing). There's a chance that the user will get this behavior only with trial and error.