Adjusting Units for Stall Sales

[Autumn]

I am trying to sell some elements but i don't want to sell all of them. Or in smaller bunches. Say I have 400 earth elements and i want to sell them in groups of 50. Is there a way I can do this? On the stall window I enter the unit amount but it won't register. (I click on unit and hit backspace and then enter a new number, say 50). It will only sell in bunches. I am sure there is a simple solution to this but I can't figure it out.

[cin]

shift+left click the item makes you turn em into smaller bunches.

next time, put this in questions n answers

moved

[Autumn]

Thanks.

And I realized i should have put it in Q&A after I posted it. Whoops.