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]: ['D', '5207', 'E', '119', 'g', '2991', 'G', 'g', 'u']
[EX A]: 8317

[EX Q]: ['7209', '3191', 'a', 'V', 'F', '4069', '1169', '7233', 'B', 'H', 'H']
[EX A]:
22871