Susan spent 600/2=<<600/2=300>>300 on clothes

After buying clothes she had 600-300= <<600-300=300>>300 dollars left

She spent 300/2=<<300/2=150>>150 dollars on books

She had 300-150=<<300-150=150>>150 dollars left

# Answer

150
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Susan earned $600 from babysitting over the summer. She went shopping and spent half of it on clothes. Then she spent half of what was left on books. How much money did she have left?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
150
Susan earned $600 from babysitting over the summer. She went shopping and spent half of it on clothes. Then she spent half of what was left on books. How much money did she have left?
train