Definition: 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.
Input: Last week Tim had 12 dollars and Keith had 36 dollars. Tim washedcars over the weekend and now has 75 dollars. How much money didTim make washing cars?

63.0