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]: ['X', 'P', 'x', '9471', '5', 'c', 'f', '5077', '1085', '2267', 'R', 'q', '4987', '9529', 'H', 'n', 'r', 'u']
[EX A]: 32421

[EX Q]: ['6347', '5495', '169', '9503', 'H', '571', '6105', 'X', 'r', 'e', '7369', 'a', 'd', '6999']
[EX A]: 42558

[EX Q]: ['2675', 'B', 'G', '2241', '5563', '9975', '4961', 'w', 'v', '3619', '3811', '5643', '1865', '1851', 'q', '1675']
[EX A]:
43879