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]: ['7831', 'O', '6017', 'v', 'U', '5761', 'Q', 'Q', 'w', '8465', 'Z', 'P', 'i', 'u', '1635', 'n', '8471', '4213']
[EX A]: 42393

[EX Q]: ['61', '5695', 'u', '253', 'n', '1035', 'd', '3017']
[EX A]: 10061

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