Your choice to say now is clicking on the item itself, I feel?
Like, I think if you're doing the quests you should have some sort of awareness what the quest itself asks for.
But, with that, if it's something like Hump Racing and you misclick then I can see that being an issue.
A work around would be a pop-up saying "Are you sure?"
Because, for a quest like Aquarium, most people just toss worms anyway knowing their price in SS.