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: ['3331', '5791', 'r', 'Q', '2243', '8229']

Output: 19594


Input: Consider Input: ['Z', '4157', '5185', 'U', 'i', '1115', 'A', '7427', '3313', 'S']

Output: 21197


Input: Consider Input: ['u', '1297', 'x', '1149', '2071', 'M', '2759', '1777', 'b', '1513', 'K', '5613', 'v']


Output: 16179