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: ['1057', '3937']

Output: 4994


Input: Consider Input: ['D', 'b', 'h', 'p', '1637']

Output: 1637


Input: Consider Input: ['c', 'a', 'a', '6859', 'Z', 'i', 'E']


Output: 6859