The requirement is not so clear.
Do you want a concatenated label (Vendor - Mat type - Customer) in the chart ? If so, you can write formula in excel to get the concatenated label and map the range as label in column chart.
The requirement is not so clear.
Do you want a concatenated label (Vendor - Mat type - Customer) in the chart ? If so, you can write formula in excel to get the concatenated label and map the range as label in column chart.