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]: ['3351', '6445', 'Y', '8455', 'V', 'z', 'a', 'V', 'S', '8551', '4101', 'q', '8743', '5999', '7155', '3825', '2241', '9957']
[EX A]: 68823

[EX Q]: ['x', '1305', 'b', '8193']
[EX A]: 9498

[EX Q]: ['j', 'H', 'y', '2659', 'J', 'T', '193', 'F', 'O', 'D', '4829', 'Y', 'G', '2917', 'E', 't', '1973', 'n', 'J', 'n']
[EX A]:
12571