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.

[EX Q]: ['4201', '6445', '4009', 'q']
[EX A]: 14655

[EX Q]: ['9403', 'u', '4159', 'w', '3467']
[EX A]: 17029

[EX Q]: ['G', 'z', '6741', 'x', 'h', '8247', '407', '3079', 'E', '7503', '8513', '5023', 'k', 'e', 'c', '1185', 'U']
[EX A]:
40698