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]: ['2485', 'Q', 'G', '5533', 'Y', '21', 'D', 'S']
[EX A]: 8039

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

[EX Q]: ['g', 'Y', 'u', 'h', 'm', 'J', '3683', 'Y', '3685', '2705', '6655', 'd', 'd']
[EX A]:
16728