How to text-align:right the descriptions of both Cart and Checkout Totals-section, with a reasonable space (50px) between descriptions and amounts.

Within Checkout, below accordion:
1 CHECKOUT OPTIONS
…
6 CONFIRM ORDER
the products are shown one per row.

Below products:
How to text-align:right the Sub-Total, Shipping cost, Discount Code, Tax, and Total descriptions. (Amounts are already float:right)

If I change the following from left to right within screen.css, it makes a mess:
#shopping_cart .s_total strong,
#shopping_cart_confirm .s_total strong
{
float: left;
}

Additionally:
How to add the word “Shipping” to the shipping description?
How to add the word “Tax” to the Tax description?

Thank you.