The product demonstrates the ability to display quantity inputs for option values and compatibility with other extensions -  Live Price  and Related Options. At the moment of the loading of the page all option values are accessible, but depending on the selected values of the Color option the Related Options module disables or enables values of the "Size" option (because only some specific combinations of Color-Size are set as available for the product using the Related Options module). 

The  Live Price  module provides the price updating on every change of option quantities.

The  Live Price  module (as well as its improved versions  Live Price PRO) and the Related Options module (as well as its improved version Related Options PRO) are not included in the package of the Quantity per Option module. They should be purchased and installed additionally (if their functionality is needed).