Process order creation

Hi All,

I am creating process order for material X, component material is Y. As per Material BOM for 1000 L of X quantity of material Y required is 12.3 gm.

But when I create process order, quantity of material required in process order : material list is 13 gm not 12.3 gm.

For the component material Y, base unit of measure is kg while unit of issue is gm.

Thanks in Advance.