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.
--------
Question: ['Z', '6245', 'N', '1403', 'b']

Answer: 7648


Question: ['c', 'r', 'R', 'a', '6915', 'C', '3651', 'j', 'L', '9761', '2923', 'Z', 'e', '833', 'W', '1867', 'G', 'H', 'T']

Answer: 25950


Question: ['g', '9985', '1791', 'o', 'Q', '7411', '9259', '1961', '5147', '59', '7011']

Answer:
42624