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]: ['f', 'F', 'E', '2279', 'r', '6419', 'd', 'M', '3975', '3797', '9201', 'F', 'c', '4753', '959', 'v', '8963', '4007']
[EX A]: 44353

[EX Q]: ['z', '3199', 'r', '849', 'C', 'v', '1931', 'M', 'Q', '4531', '579', 'x', '8997', '4663']
[EX A]: 24749

[EX Q]: ['937', 'I', 'O', '8857', '6363', 'd', '1385', 'b', 'W', '2389', '5109', '3329', '1765', '6225', 'Y', 'N', 'H']
[EX A]:
36359