Question about converting Value to Growth using Futures

Hello everyone,

so the institute for chartered flight attendants recently put out a practice test for early risers, and question 32 asks about how to convert the drinks of a passenger on the plane from cheap drinks (aka value drinks) towards energy drinks (aka growth drinks).

However the solution talks about converting the value drinks to cash.

Is this a mistake or am I missing something?

Thanks for the help.

Tartaglia