Doubling Qty in the BOM for an assembly

What is the easiest way to double the qty in a BOM withoutadding the components in the model itself?

In my drawing I only want to detail a RH weldment and place a noteindicating "LH Weldment is mirror copy of RH weldment". But I wantthe BOM to reflect the quantities needed to build both a RH and aLH weldment.

TIASolidworksBill Of Materials