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]: ['s', 't', 'W', '163', 'v']
[A]: 163


[Q]: ['Q', '1767', '5523', 'I', '933', 'h', '2189', 'f', '7795', 'X', 'M', 'G', '1215', 'W', '8619']
[A]: 28041


[Q]: ['V', 'e', '6487', 'D', 'e', '8563', '9069', 'h', '853']
[A]:
24972