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]: ['7231', '2813', '51', '1745', 'c', 'a', '4929', '3185', '5707', '2095', 'f', 'S']
[EX A]: 27756

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

[EX Q]: ['9215', 'q', '5075', '9077', '1029', 'R', '9401', '4599', '9255', '9889', '597', 'v', 'j', 'O', '6751', '9291', 'A', '4059', 'A']
[EX A]:
78238