Combine and sum duplicate rows

How to combine duplicate rows, if values in two columns are identical....and sum qty from third column:
Sample file attached, but here's the jist of it:
          B             D           F
      Frame    White    100
      Frame    White    200

        to show one line:
      Frame    White    300

Can this be done with formula or VBA?
Rows are not adjacent...can be spread out throughout the spreadsheet (if it matters, it's fairly small sheet...never has more than 50 rows)

Thanks!
sample.xlsx