error in vprs condition type

Hi,

In a sales order net value of item was rs 230.I removed the statistics tick from vprs condition type in pricing procedure and saved with 11 alt calc type.cost was 190

and net was 230.In the sales order cond value infront of vprs Rs.230 is showing not the diferance of 230 and190 which acording to me shd have been calculated TO GIVE PROFIT margin.Please help.