How to show approval amount in Po notification bell subject line/ title

Hi Expert

We tried to edit the subject line of a purchase order notification using BPM.

But only the amount ordered can be displayed.

Even if we select the approval amount from the payload still its showing ordered amount.

I used all the amount related payload to see where we can get the approval amount but all of them have same value only ordered amount.

Can anyone help how to show the total amount ordered+tax in the notification title?

Thanks in Advance