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]: ['G', 'o', 'g', 'I', 'S', '9193', 'G', 'C', '2481', '435', 'm', '1005', '5605', '6501', 'D']
[EX A]: 25220

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

[EX Q]: ['O', '1591', 'u', 'Y', '3961', '6973', '3323', 'L', 'w', 'K', '5873', 'i', '653', 'M', '6611', 'L', 'M', 'r']
[EX A]:
28985