Product with multiple prices per group AND multiple prices per attribute (DISCRIMINATE PRICES)

[demperador]

Hello everyone. I've got what I think it's a huge problem with Prestashop v1.4.0.17 (stable). First of all I want to explain that my business is related with professional products for hairdressing, aesthetics etc. Our enterprise has double price to distinguish professional customers (those who own somekind of hair salon that resell the products or use them at the salon) and the general public (who have a bigger price for the products). At this point I haven't got any kind of problem with this new version (1.4.0.17) to discriminate prices. However, to ease the customer's navigation through the web page I'd like to use the attributes so that for example a shampoo that comes in 250ml, 500ml and 1500ml (each size with it's own price) appears as a single product with this attributes for this single product. Problem is that at the same time I still want to discrinate prices between the professional customers and the general public. For example:

Product: Shampoo

Size Professional Price General Public Price
250ML 10€ 20€
500ML 20€ 30€
1500ML 30€ 40€

My question then is: Can I make a single product, have these three attributes and at the same time still discriminate the prices per attribute? Without using and increase or decrease through percentages as if it was a discount (product on sale or offer) I'd like an answer please! Thanks a lot and keep up the great work everyone.