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: ['z', 'j', 'M', 'E', '1689', '8413', '2603', 'b', '5101', 'w', 'r']

Output: 17806


Input: Consider Input: ['Z', '6245', 'N', '1403', 'b']

Output: 7648


Input: Consider Input: ['Y', 'b', 'I', '4041']


Output: 4041