In this task, you are given an input list A. You need to find all the elements of the list that are numbers and calculate their sum.
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Question: ['D', 'G', '9895', '143', '37', 'S', '1539', 'x', 'a', 'x', 'B', 'i', '9719', '839']

Answer: 22172


Question: ['597', 'i', 'd', '3201', 'u', '1111', '8563', 'c', 'E', '5983', '6293']

Answer: 25748


Question: ['x', '1305', 'b', '8193']

Answer:
9498