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]: ['z', 'j', 'M', 'E', '1689', '8413', '2603', 'b', '5101', 'w', 'r']
[EX A]: 17806

[EX Q]: ['4811', 'Q', '2289', 'N', 'I', '7681', 'z', '8179', '3359', '5299', 'R', 'z', '8697', '5781', '4803', '2715', '6511', '1371']
[EX A]: 61496

[EX Q]: ['D', '773', '8277', '4159', 'w', '4903', '5739', 'o', 'k', '859', 'I', '5021', 'A', 'J', 'S']
[EX A]:
29731