Majin-Tenshinhan on 15 August 2009
It's all about profit. While Son C has the most revenue, he also makes no profit. He breaks even. 5 glasses nets him 4 dollars, and 5 glasses are 1 litre.
Son B, however, sells it for a loss. His costs 3 dollars for one litre, and he gets 2 dollars and 50 cents for one litre. So for every litre he sells he loses 50 cents.
Son A is the clear winner, because he makes a dollar for every litre he sells. Five glasses at 60 cents a piece nets him 3 dollars, and the cost to make a litre is 2 dollars.
