How to Modeling Price?

Hello,

My question here is: the price of procuct is rarely changed, so I should create a characteristic called price, then put it as a attribute of the product, is it should be a navigation one or display one? In the query, I want to calculate the revenue(price*quantiity) that in cube, only quantity this one key figure. In this case, could you please tell me how to modeling price? and can you share your document to me? mail box: rely_zhang@hotmail.com

Thanks

Ryan