Teacher:You are given a math word problem and you are supposed to apply multiple mathematical operators 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.
Teacher: Now, understand the problem? Solve this instance: katie spent a total $ 350 on her whole stay in the island . if she spent $ 125 on food and $ 135 on hotel rooms how much did she spend on buying other stuff ?
Student:
90