You are given a math word problem and you are supposed to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Example Input: Fred loves trading cards . He bought 2 packs of football cards for $ 2.73 each , a pack of Pokemon cards for $ 4.01 , and a deck of baseball cards for $ 8.95 . How much did Fred spend on cards ?
Example Output: 18.42

Example Input: Norma has 88 cards . She loses 70 . How many cards will Norma have ?
Example Output: 18

Example Input: Jane buys an apple for $ 0.75 and pays with a $ 5 bill . How much change will she get ?
Example Output:
4.25