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: ['x', 'd', '5121', 'I', '6737', '3789', '6167', 'C', '8947', 'k', '4715', '1885', 'H', 'B', '5685', 'S', '4615', 's', '7709']

Output: 55370


Input: Consider Input: ['6055', 'v', '9455', 'A', '6817', 'D', '9339', 't', 'K', '1993']

Output: 33659


Input: Consider Input: ['7777', '5697', 'P', '2795', 'R', '1971', '9793', '8369']


Output: 36402