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]: ['A', '9979', '8723', '1131', 'i', 'p', 'M']
[EX A]: 19833

[EX Q]: ['8993', 'q', '7809', '4391', 'y', 'X', '5199', 'C', 'Q', '6995']
[EX A]:
33387