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]: ['1845', '273', '6921', 'u', '165', 'n', 'y', 'I', 'u', 'X', '5503', 'L', 'G', 'V', '6223', '1123', 'v']
[EX A]: 22053

[EX Q]: ['h', '9539', '3373']
[EX A]: 12912

[EX Q]: ['2529', '8977', '6675', 'J', 'g', '4445', '6149', '9413', '8755', 'B', 'l', '7359', 'S']
[EX A]:
54302