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: Jonah added 0.3 cup of yellow raisins and 0.4 cup of black raisins to abatch of trail mix. How many cups of raisins did Jonah add in all?

0.7