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: ['z', 'j', 'M', 'E', '1689', '8413', '2603', 'b', '5101', 'w', 'r']

Output: 17806


Input: Consider Input: ['4271', 'N', 'M', '5239', '7037', 'x', 'U', 's', '7107', '4163', 'f', '3607', '6155']

Output: 37579


Input: Consider Input: ['s', 'U', 'f', '873', '2915', 'N', '7115', 'D']


Output: 10903