Adding Quantity Selection Within Item

[PokerSupplyCenter]

On my site, I am adding poker chips, and ran into an issue I didn't expect. How to I make it so customers can select how many of each color they would like to be added to their shopping cart?

 

For Example:

 

Poker Chip Model A

 

Red |Select Amount|

Blue |Select Amount|

Green |Select Amount|

 

I would like them to be able to just type in the number instead of selecting from a drop box, but the system will need to add up the total and send it to the shopping cart for checkout.

 

Any ideas?

 

Mike