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: ['4701', 'b', 'i', 'B', 'z', '7837', 'W']

Output: 12538


Input: Consider Input: ['r', 'b', 'G', 'H', '255', '6809', '5133', '1059', '4317', 'P', '7219', 'd', '805', 'G', '5243', '8305', '8509', 'o']

Output: 47654


Input: Consider Input: ['n', '8621', 'H', '6593', '6261', '2315', 'l', '39', 'D']


Output: 23829