Special Quantity Discount - Cross Sell?

Hi,
I'm currently offering quantity discounts for some of my products:
1 item-Price1, 2 items-Price2, 3+ items-Price3

Let's say that I have three different products A, B, C that use quantity discounts:

Product A
Price 1A, Price 2A, Price 3A
Product B
Price 1B, Price 2B, Price 3B
Product C
Price 1C, Price 2C, Price 3C

• If the customer place an order of any three different products A, B, C. he/she will be charge the better price of the quantity discount price, i.e:

Total Cost= Price 3A + Price 3B + Price 3C.

• If the customer place an order of (2) of the same product plus another product, for example (2) Products A and (1) Product B, he/she will be charge the better price of the quantity discount price of each product, for example:

Total Cost= 2 x Price3A + 1 x Price3B

Is this possible to do? Do I need to hire a pro?

Thanks in advance for reading and helping me.

Jorge

Response by PM.