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]: ['U', '9593', '2079', '5959', 'T', '5849', 'w', 'b', '9743', '6689', 'k', 'J']
[EX A]: 39912

[EX Q]: ['901', 'X', 'W', 'D', 'm', 'M', '59', '4855', '6523', 'R', '9781', '8271', '4449', '2221', '8391']
[EX A]: 45451

[EX Q]: ['1705', '8007', 'Q', 'O', '4725', 'N', 'C', '3081', '9269', 'Y', '121', '2231', '6703']
[EX A]:
35842