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: Jason found 49 seashells and 48 starfish on the beach. He gave 13 ofthe seashells to Tim. How many seashells does Jason now have?

36.0