To take a taxi, it costs $ 3 . 0 0 $3.00dollar sign, 3, point, 00 plus an additional $ 2 . 0 0 $2.00dollar sign, 2, point, 00 per mile traveled. You spent exactly $ 2 0 $20dollar sign, 20 on a taxi, which includes the $ 1 $1dollar sign, 1 tip you left.