Does anyone know if ubercart has this module?

I want the sellers can fill in quantity of a product they want to sell when the sellers create a product node.

for example

I have 30pcs of MP3 players need to be sold, I want to show "total: 30 pcs,sold xx pcs " on the product node.eg,if we sold 1 pcs out,then show "30 pcs,sold 1 pcs"

Does anyone know if ubercart has similar function module already?

thanks in advance.