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.

Ex Input:
Joan joined her school's band. She bought a trumpet for $149.18, amusic tool for $9.98, and a song book which was $4.14. Joan found$8.65 in her pocket. How much did Joan spend at the music store?

Ex Output:
163.3


Ex Input:
Tom has 30 violet balloons, he gave Fred 16 of the balloons. Howmany violet balloons does he now have?

Ex Output:
14.0


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

Ex Output:

12.0