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.

['D', 'G', '9895', '143', '37', 'S', '1539', 'x', 'a', 'x', 'B', 'i', '9719', '839']
22172

['Y', '263', '641', '1163', 'p', 'r', 'L', '4425', 'C', '7585']
14077

['l', '6219', 'o', 'q', '5159', '6505', 'c', '3671', '1953', '4341']

27848