Debut Theme – showing 'total including tax' with automatic cart updates enabled

Store Design
1

Hi,

I’m using the Debut theme and want to display the cart total with tax on the cart page. I’ve achieved this by using:

{{ cart.total_price | times:1.2 | money_with_currency }}

(UK tax is 20% and we only sell to customers in the UK)

The problem is I have ‘Enable automatic cart updates’ enabled, but when changes are made in the cart everything updates except the ‘total with tax’ amount.

Is there any way to get this to update when cart changes are made?

Thanks!