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: ['Q', '9787', '7533', '9489', 'C', '1753', '5121', '1405', '9267', '4815', 's', '5887']

Output: 55057


Input: Consider Input: ['N', 'V', 't', 'X', 't', 'M']

Output: 0


Input: Consider Input: ['h', 'v', 'E', '6053', 'w', '8875', 'C', 'O', '5897', '6685', 'M', 'D', '4665', '5177']


Output: 37352