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]: ['2923', '3573', '6179', '7673', '6551', 'B', '315', '5169', 'm', '9405', 'm', 'Z']
[EX A]: 41788

[EX Q]: ['4509', '4165', '8651', '8057', 'a', '2241', 't', 'i', 'q', 'S', '5149', 'J', 'j', '1373', 'W', 'X', '235', 'm', '3225']
[EX A]: 37605

[EX Q]: ['O', '773', '7713', '1321', '8727', 'S', '617', 'H', '4597', 'l', 'f']
[EX A]:
23748