Show total order in One page Checkout on payment method

[seog]

Hi there,

 

I am adapting One page checkout files and I need Show total price order with tax in the Step 3.

Adding this code in modules/bankwire/views/templates/hook/payment.tpl it works

{convertPrice price=$total}

 

but if I have two carriers and I click in other carrier then the total price order disappears in Step 3 (payment method) when it changes perfect in Shooping cart total sumary

 

I tried also adding var with the next codes but this don´t work

{assign var="total" value=($total_price + $option.total_price_with_tax)}
{convertPrice price=$total}

 

Any help me?