Map refunds to transactions and deduct the same in reports

There can be a feature to map refunds to transactions. Same should be updated in reports. Like if we make a purchase for 100 rupees and while returning the website deducts 20 rupees as that was charged against non refundable platform fee. If this kind of transaction is shown seperately in reports.

Also, if we spend 2000 on any category and return 1000 rupees worth item, same should be considered when calculating expenses