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: ['7361', '3605', 'V', '2039', '9665', 'X', 'b', '1195', '657', '6509', '7195', '2013', '1847', 'v', '9499', '1761']
Example Output: 53346

Example Input: ['4601', '6021', '3005', 'I', 'f', '4631', 'Q', 'd', '8041', 'D', '8067', '7383', '757', 't', 'd', 'n', '2275', 'p', 'm', '6021']
Example Output: 50802

Example Input: ['7875', '1639', 'Y', '9797', '6741', 'v', '5923', 't', 'x', 'u', 'V', 'U', 't', 'S', 'R', 'l', '9251']
Example Output:
41226