Shopping cart just 1 rule instead of a rule per article

Hi,

I hope someone can help me with this:

On this site: https://www.designmaxx.nl/products-page/banken/ i have a shoppingcart item on the right top corner.
For every article i add, it makes one rule but i want it to show only one rule with all the articles counted.

not like this:
Aant. 1 article € 100,-
Aant. 1 article € 100,-
Aant. 1 article € 100,-

but something like this:

Aant. 3 articles € 300,-

Is that possible?

Thanks

p.s. Sorry for my English.