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', '6085', '6989']

Output: 15861


Input: Consider Input: ['q', '867', 'e', 'z']

Output: 867


Input: Consider Input: ['5305', 'd', 'W', 'A', '9247', '5461', 'J', 'W', 'i', '3337', '6129']


Output: 29479