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]: ['6629', 'o', 'e', '497', '4865', '8733', '5733', '7337', 'N']
[EX A]: 33794

[EX Q]: ['2577', 'B', '3059', 'S', 'l', 'T', 'Q', 'x', 'f', 'l', 'y']
[EX A]: 5636

[EX Q]: ['9141', 'a', '2275', '1755', '5437', 'e', 'g', 'o', 'k', '2221', 'b', '7701', 'D', '7453', 'B', 'Y', '1593', '9827']
[EX A]:
47403