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]: ['Y', 'X', 'd', 'N', '1877', '2865', 'M', '1249', '9385', 'v', 'o', 'P', 'P', '6029']
[EX A]: 21405

[EX Q]: ['5021', 'q', '9387', '5067', 'D', '943', 'K', 'x', '7675', '6009', '2297', 'T', '9373']
[EX A]:
45772