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.

Input: Consider Input: ['8667', '4129', '7075', '6345', '1315', 'M', 'F', '9073']

Output: 36604


Input: Consider Input: ['1867', '5301', 'x', '3867', '8707', '2429', 'K', '59', '6629', 'v', 'A', 'y', 'P', '3829', '1979', 'R', '8481', '5767', 'h', 'U']

Output: 48915


Input: Consider Input: ['k', 'Q', '5775', '389', '129', '3957', 't', '3433', '8937', '6537', '3069', '4429', '6645', 'f', '1667', 'E', 'R', 'x']


Output: 44967