Weight of Assemblies

I'm fairly new to Solidworks been using Inventor for years and i can do this real easy in it. I have an assembly with 16 configurations. In my BOM i want to show the weight of the assembly. The Bom only allows me to add a colum with the weight for the components but not the total. The configurations are in colums so it seems like i need a row to show the weight but that's not an option. The info of the weight is there and i've got the mass properties box checked as well as a cutom prop "weight" added. Just can't get it to show up on the chart. I have an excel sheet to show how i would prefer it but the BOM tool is limited or probably just my knowledge of it. Any help would be great.SolidworksBill Of Materials