Detailed Instructions: You are given a math word problem and you are supposed to apply a single mathematical operator like addition, subtraction, multiplication, or division on the numbers embedded in the text to answer the following question and then only report the final numerical answer.
Q: haley had 2 dollars . if she got 13 more dollars in total for doing chores and her birthday what 's the difference between the number of dollars before haley got money and she got from events ?
A:
11