Subtotal for report

On report generation we need subtotal for monthly basis. For Eg., If im generating a sales order report for the period from Jan 19 to Dec 19.

  1. I need the report on Monthly basis with subtotal of Qty & Value only.

  2. in reporting the total should displayed only for our required column not for all the columns, How to avoid the totals of unwanted columns

Please advise.

Can the support team guide for my above msg