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]: ['w', '2281', '8651', '2203', 'q', 'n', '4253']
[EX A]: 17388

[EX Q]: ['z', '6885', '6095', 'V', '3713', '7569', 'E', '5217', '9379', 'S', '1241', '1073', 'h', 'V', 'q', '6805', 'z', 'w', 'S']
[EX A]:
47977