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]: ['W', 'O', 'c', 'r', 'E', 'w', '9811', '6421', '3543', '4293', '8255', 't', '229', '745', 'w', 'p', '6861', '5305', 'h']
[EX A]: 45463

[EX Q]: ['7465', 'G', '105', 'A', '3987', 'O', '7385', 'C', '8957']
[EX A]: 27899

[EX Q]: ['3513', 'K', '2035', '4057', 'A', '5149', 'Z', 'v', '3071', 'U', '6255', '7869', 'a', 'F', 'e', 'o', '911', 'k']
[EX A]:
32860