Ann: Preliminary Final Report, page-26

Clarevale seriously - ask an experienced barista at a cafe about how they input on the till/bump screen add on charges and I am betting they use the same button for extra shots and flavours its around around a 50 cent extra charge for both .
The same button is used , also at the end of the day that same button for either flavours or extra shots means the 50 cent charge stays with coffee sales rather than the cabinet food sales
Alternatively but unlikely a $1.00 extra charge for an exrtra shot is used which is the same extra charge for almond/soy milk .