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]: ['6585', '5263', '9497', '1117', 'a', 'F', 'w', '6595', '547']
[EX A]: 29604

[EX Q]: ['135', 'a', 'X', '8067', '8447', '4009', '4221', 'o', 'A', 'x']
[EX A]: 24879

[EX Q]: ['T', '2747', 'H']
[EX A]:
2747