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]: ['u', 'W', '1561', '9243', '4923', '9385']
[EX A]: 25112

[EX Q]: ['8147', '3191']
[EX A]: 11338

[EX Q]: ['I', '5511', '3237', 'E', '4267', 'z', '5409', '1355', 'i', 'C', '5985', 'w', '539', '7395', '5991', 'u', 's', '6553']
[EX A]:
46242