Show product and quantity total excluding tax on checkout page

[ibdbeaba]

Hello,

 

In USA we typically show

1) the checkout total excluding tax

2) shipping

3) total tax

4) Total cost including tax and shipping

 

However, in Prestashop it shows the product and quantity total already including tax. How can I change this?

 

http://i.imgur.com/NupoXft.png