this game was a lot of fun! however its only fun when you know how to play. So in anwser to your question-when you click on the choclate you want to sell there should be a place where you click on it and it changes the number in the tiny box. Right next to it should be an ok button click on that when the number in the tiny box is the one you want. Or it it is a good place sell it all!
jk
hope that helps!

I used to get that every single time I tried.  What I did was download the latest version of shockwave and flash player.  I then reinstalled it yet again.  It also might help if you don't have any other windows up or any thing your downloading or playing.  I hope this helps because im not actually that sure if this is what your looking for.