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.

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


[Q]: ['b', 'i', '7807', 'g', '1611', '6733', 'V', '561', 'C', '8575', 's', 'E', '8129', 'F']
[A]: 33416


[Q]: ['J', '7405', 'k', 'o', '9155', '8733', '1207', 'h', 'G', 'l', 'N', '8637']
[A]:
35137