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: ['2787', 'z', '9351', '3339']

Output: 15477


Input: Consider Input: ['D', 'P', '9951', '2897', 'V', 'C', 'B', 'H', 'c', 'h', '2843', 'a']

Output: 15691


Input: Consider Input: ['f', 'H', 'J', '6353', '5613', 'Q', '629', 'R', '7125', 'Q', 'o', '1383', '3383', '1863', '43', '4701', 'm', 'a', 'A']


Output: 31093