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 Input:
['457', '173', '6807', 'o', '555', 'l', 's', 'Z', 'm', '3035', '1283', '5645', 'S', '8641', 'J', 'Z', 'z', 'K']

Ex Output:
26596


Ex Input:
['3331', '5791', 'r', 'Q', '2243', '8229']

Ex Output:
19594


Ex Input:
['2763', 'S', '5455', '7933', 'H', 'h', 'P', '8915']

Ex Output:

25066