Allow One Total Price for Multiple Quotation Line Items

For event quotations, we often need to show multiple line items with different descriptions and quantities, while displaying only one combined price for the entire group.

As shown in the example below, each line item has its own description and quantity, but the Total Price column shows only one amount for all items in the group.

We would like the quotation template to support this format, either by grouping multiple line items under one total amount or by allowing the Total Price/Amount cell to be merged across multiple line items.