Thank you for providing an illustration of Aggregation. Please do add one more solution for my question, How can we set subtotals for multiple columns using factory method? In the illustration provided, we may add one more column, say NETPR, for displaying Net Purchasing Value. In that case we need to aggregate subtotal for both the MENGE and NETPR fields. Please help me modify the code accordingly. Is there any other methods to achieve aggregation of multiple columns? Please do reply.

Thank you for providing an illustration of Aggregation. Please do add one more solution for my question, How can we set subtotals for multiple columns using factory method? In the illustration provided, we may add one more column, say NETPR, for displaying Net Purchasing Value. In that case we need to aggregate subtotal for both the MENGE and NETPR fields. Please help me modify the code accordingly. Is there any other methods to achieve aggregation of multiple columns? Please do reply.

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