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: Before December, customers buy 1346 ear muffs from the mall.During December, they buy 6444, and there are none. In all, howmany ear muffs do the customers buy?

7790.0