Variations Table with Tiered Pricing and Add to Cart Button

I would like to create a product page that lists products like this ULINE page but I cannot find a plug-in for something similar. Maybe I need 2 or 3 plug-ins? I have bags to sell in different sizes, just like this web link, and I want people to see the quantity price breaks and then type in how many they want and press a button to add to cart. I have found plug-ins that almost do this but my table needs to be a list because there are so many sizes and I want them all on the same page. Any ideas? Thank you in advance for your time.

The page I need help with: [log in to see the link]