Material listing in BOM

After assigning a material to a part (setup, material), I would like it to
be displayed when I print the BOM for assemblies.  I am not sure if material
would be a system parameter or not.  Here is a clip of the custombom I am
currently using.

.breakdown
%$type %$name contains:
.titles Qty; Name; Type
.row %$quantity[-5d]; %$name[-32s];  %$type[-11.11s]


.summary
Summary of parts for assembly %$name:

.titles  Name; Qty ;  Thick   ;  Width  ;  Length
.row %$name[-31s]; %$quantity[-3d]; %D1[-3.3s];%D3[-3.3s];%D4[-3.3s];
%$material[-3s]
mfg