Hi Ravali,
One more solution for this requirement.
You can use before commit event (Event Handlers) for the entity which you have used in dataview.
When user saves the form, before commit event microflow will be triggered which calculates the sum of all the necessary attributes and set the value to the attribute ( which will be displayed as a last column) which holds the total value.
What i read from your message is that you want:
The simple route to go is using an On change or On leave action on the fields that are fillable
hope this helps :)