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.

Edward started his own lawn mowing business . In the spring he made 2 dollars mowing lawns and in the summer he made 27 dollars . If he had to spend 5 dollars buying supplies , how much money did he end up with ?
24

Tom purchased a Batman game for $ 13.6 , and a Superman game for $ 5.06 . Tom already owns 2 games . How much did Tom spend on video games ?
18.66

There are 12 birds on the fence . 8 more birds land on the fence . How many birds are on the fence ?

20