how to create this type discount

[devilx]

Hello , 

 

i want to create discount for my clients but i dont know how can i create this type discount without module .. any free options

 

product A = 30 euro ( free shipping )

Product B = 30 euro ( free shipping )

product C = 30 euro ( free shipping )

Product A+ B = 30 + 30 = 50 euro with discount

product A+b+C = 30+30+30 = 70 euro with discount.. ( like after quantity 2  or more every product price is 20 euro.. )

or  i want maybe this 12% discount to last price on cart.. i try catalog price discount and its work great but only when i buy same product 2 times ( A+A = 12% discount ).. but when i buy product A+B = no discount.. 

how can i make discount to total price ?

[RensR]

Hello, I think that with the default options of prestashop you cannot configure this type of discounts, however in the prestashop addons store you can buy a module that does exactly what you want. I bought one that works perfectly for me.