I am sorry if the title did not describe that correctly, but what I want to do is link certain products to my attributes. I sell soaps and offer a deal where customers can choose four soap scents for a single price. If a customer choose lavender, for example, the attribute does not subtract it from the actual product, that is, the individual lavender bar is still at the same quantity it was at before the customer purchased the lavender bar as part of the deal. How could I make it so that if a customer purchases a product with an attribute, that attribute removes one quantity from the original products quantity?

I hope I have explained that well enough. Thank you in advance for any help.