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: ['R', 'k', '3355', 'Y', '6635', 'M', '4839', 'T', 'd', '495', 'g', 'E', 'g', 'F', 'S', '5377', 'g']

Output: 20701


Input: Consider Input: ['Q', '1669']

Output: 1669


Input: Consider Input: ['5271', 'G', 'Q', 'O', 'i', '6379', '4307', '4953', 'm', '4843', '5625']


Output: 31378