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.

Example Input: ['v', 'Y', '4135', '8645', '263', '5377', '8677', 'Z', 'W', 'g', 'n', 'r', 's', '8513', '5677', 'u', '3033', 'I']
Example Output: 44320

Example Input: ['4159', 'H', 'h', 'W', 'w', 'i', 'G', 'l', 'j', '5467', '9219', 'j', 'q', 'n', '5465', '6197', 'J', 'y']
Example Output: 30507

Example Input: ['E', '3685', 'C', '8599', 'r', 'R', '1913', 'E', '9361', 'e', 'R', 'y', '1559', 'N']
Example Output:
25117