More maths

The race was 32.5 km long. So far teri has run 18.85 km. How much further has she got to go? There is a sale on at Just Jeans. If you buy one pair of jeans for full price you can get the second pair for ½ price. The only condition is that you have to pay full price on the most expensive pair. Jay wants to buy a pair that costs $127.40 and a pair that costs $134.99. How much money will she spend?