setup cost price with two customer

Hi

I've problem on how to setup two cost price for one material from same vendor.

Let says i have material ABC, this material came from Vendor A

then i need to enter cost price for this material using info record.

the problem is we have two different supplying group, one is branches other is dealers

if Branches buying material ABC from Vendor A .the price will be , let sys 10 dollar

and if dealer buying material ABC from VEndor A the price will be 20 Dollar.

in SAP how to i configured this process ?