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]: ['4529', '7465', 'S', 'Z', 'v', 'w', '5791', '3363', '2643']
[EX A]: 23791

[EX Q]: ['h', '1157', 'm', '8975', '6165', '7491', '1855', '3489', '9629', '631', '9641']
[EX A]: 49033

[EX Q]: ['7261', '4603', '47', '3765', '3513', '2487', '9439', 'J', 'L', 's', '5391', '975', 'g']
[EX A]:
37481