Multiple sales price for a FG with reference to another FG

Hi All,

In the following scenario,we need a solution in sales pricing.

FG Materials: A, B, C

price of A is X when sold independently.

price of A is Y when sold along with B in a sales order

price of A is Z when sold along with C in a sales order

How do you maintain pricing in the above scenario, and how it is determined is sales order?

Pl give your suggestions if you have come across above similar situation.

Thanks in advance.

Regards

Prabhu