Adding quantity to a Commerce product's attribute I have a D7 Commerce Store. It will be selling to wholesales. 

I have a Product that has multiple attributes. An example of the attributes is as follows;

T-Shirt Printing (Product)


Size (S, M, L, XL, etc)
Sides (1 Side, 2 Side)
Service Type (All over, Spot)


How can I allow the customer to add that 1 product with multiple of a particular attribute?

Example; Customer should be able to order, 10 Small, 15 Medium, 20 Large of that one product "Tshirt Printing".

The Image below is an example from jakprints.com. I would like to do something similar. How can I replicate this in commerce? Or instead of using sliders... + or - buttons.

Please provide a few different ideas or POV's towards achieving this.
Use the Commerce Add to Cart Extras module. It provides a new product reference field display formatter that does exactly what you need.