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: Fred has 10 red balloons, Sam has 46 red balloons, and Dan has 16red balloons. The balloons cost 10 dollars. How many red balloonsdo they have in all?

72.0