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]: ['4089', '2385', 'E', 'K', '259', '295', '6649', '8645', 'n', '2577', '2683', '9041', 'Q', 'm', '4237']
[EX A]: 40860

[EX Q]: ['r', 'S', '9595', 'T', '1109', '3717', '2329', '7857', '8105', 'F', 's', 'c', 'S', '5099', '6823', '4411']
[EX A]:
49045