The added item widget displays the items added to cart, item type (if it's an item variation), price, and quantity. The appearance can be styled by opening the option panel:
Here you can specify the spacing, background color, and separator line color. You can also specify the font size and color for the item-name, price, and info. To change the typeface, select the Added Item widget and style the type through the Text Panel.
The default item-remove button looks like this: