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]: ['b', 'O', '7023', 'q', '2667', '681', 'C', '5707', '7125', 'q', 'Q', '1375', '8869', '6709']
[A]: 40156


[Q]: ['i', 'C', '5373', '2017', 'm', '5435', 'Y', 'h']
[A]: 12825


[Q]: ['v', '3735', 'n', 'z', 'P', '813', 'm', 'u', '129', '5663', '1375', '1371', 'e', 'G', 'n']
[A]:
13086