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]: ['4145', 't']
[EX A]: 4145

[EX Q]: ['4685', 'q', 'O', 'o', '3453', 'o', 'Y', 'C', 'a', 'i', '7283', 'J', 'n', 'Q', 'i']
[EX A]: 15421

[EX Q]: ['7619', 'l', 'c', '4661', '6039', 'y', '3749', '2521', '4419', '8909', 'R', '2775', 'O', 'B', 'S', 'n']
[EX A]:
40692