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]: ['8667', '4129', '7075', '6345', '1315', 'M', 'F', '9073']
[EX A]: 36604

[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]: ['385', 'T', 'h', '2807', 'p', '899']
[EX A]:
4091