Instructions: 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: Tom found 15 seashells and Fred found 43 seashells on the beach.When they cleaned them, they discovered that 29 were cracked.How many seashells did they find together?
Output:
58.0