You are provided with an arithmetic question. Your task is to compute the solution using the given arithmetic operations. The only arithmetic operators needed to answer the questions are'+'(addition) and'-'(subtraction). The answer should be correct to one decimal place.

Example Input: Benny picked 2 apples and Dan picked 9 apples from the apple tree.How many apples were picked in total?
Example Output: 11.0

Example Input: Melanie had 30 baseball cards, and 9 were torn. Sara bought 18 ofMelanie's baseball cards. How many baseball cards does Melaniehave now?
Example Output: 12.0

Example Input: Joan purchased a basketball game for $5.20, and a racing game for $4.2. How much did Joan spend on video games?
Example Output:
9.4