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: ['4145', 't']

Output: 4145


Input: Consider Input: ['6469', '3027', 'Z', '3353', 'a', 'S', '3879', '8471', 'H', 'I', 'y', '2661', '9007', 'D']

Output: 36867


Input: Consider Input: ['4301', '1867', '867']


Output: 7035