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: ['1165', '8341', '9685', '6749', '8571', 'p', '9355', '5319', '9587', 'B', '9581', '1719', 'Q', '577', '8883', 'S', '7851', '1069', 'i', 'y']
Example Output: 88452

Example Input: ['7215', 'd', 'q', 'k', '9301', 'P', 'x', 'C', 'g', 'e', 'o', '2769', '6993', '9769', 'v', '9007', '4131', '8627', 'q']
Example Output: 57812

Example Input: ['4029', 't', '9789', '5207', 'M', 'l', '777', 'v', '7197', '5693', '6787', 'r', 'W']
Example Output:
39479