Help changing text of button

I am creating a site for my company. I am trying to change the text on the add-to-cart button that appears on all my new posts as part of my eStore theme. I am using firebug to locate where to change the text, but cannot figure out where it is pointing me.

Try looking for this line in your source code:

<a href="#" class="addto-cart"><span>Add to cart</span></a>

Success, thank you!