Update Master Order View with subtotal

I have been trying to do this : https://codeontime.com/learn/sample-a...

Basically trying to calculate an order total if more items is added or removed from the order but my touch UI doesn't want to update the total or subtotal when I can or remove order items. I have to close the window and reopen it to find my changes on the master view.

I found that it is working in the classic view but it is not working in the touch view. Does anyone know how to get the same result in a touch view?
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