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: ['s', '407', '7983', '1523', '8983', '9841', 'p', 'y', 'N', '7633', 'T', '4177', 'Z', 'Y', '3223', '7125', '2601', '7467', '3039']

Output: 64002


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: ['r', '3439', 'r', 'H', '1319', '2859', '1777', '5303', 'g']


Output: 14697