Price Variation Cost Configuration in COPA

Hi,

COPA has been configured at one of the clients but there are certain difficulties

Sales are made to party against Sales Order and against Price Variation Order ( Price variation is nothing but the price increase or decrease which is to be recovered/ paid to customer based on changes in prices of main inputs in the international market), presently the system shows 100% Cost of Goods both against main sales order and price variation order through VPRS condition type , the requirement is that cost of goods should be shown against the main sales order and price variation cost should be shown with repect to price variation Order in COPA , What configuration changes will have to be made to fulfill this requirement?

Suggestions/ Solutions are welcome.

Regards

Milind Nair