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: ['8147', '3191']

Output: 11338


Input: Consider Input: ['j', 'f', '3831', 'B', 'D']

Output: 3831


Input: Consider Input: ['A', 'k', '1307', '7941', 'c', 'B', '1815', 'l', 'r', '1665', 'e', 'F']


Output: 12728