"But she wouldn't run out of Grass.  What I'm getting at, here, is the question of whether there's an amount of Grass that Marnie has, and then she can't sell any more than that amount, or if we can all just go on giving her G and getting Grass from her--does Marnie have the G, then?"

"But she wouldn't run out of Grass?  What I'm getting at, here, is the question of whether there's an amount of Grass that Marnie has, and then she can't sell any more than that amount, or if we can all just go on giving her G and getting Grass from her--does Marnie have the G, then?"