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: ['A', '9979', '8723', '1131', 'i', 'p', 'M']

Output: 19833

Input: Consider Input: ['89', '5965', '9463', 'k']

Output: 15517

Input: Consider Input: ['3935', '2675', '7049', 'h', '325', '4751', '7369', 'X', '1911', '1255', '2947', 'l', 'u', 'y', '8197']
Output: 40414