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]: ['6515', '5525', 'o', 'Q', '9049', 'f', 'p', 'X', '2057', 'h', '7585', '3617', '7817']
[EX A]: 42165

[EX Q]: ['6121', 'S', '8683', 'Y', '6107', 'B', '6193', '5555', '365', '945', '1439', '7257', 'g']
[EX A]: 42665

[EX Q]: ['1607', 'g', 'r', '199', '2471', 'E', '5341', 'u', 'F', '9791', '1409', '9767', 'p', '2817', '2351']
[EX A]:
35753