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: ['W', 'H', 'k', 'L', '2425']

Output: 2425


Input: Consider Input: ['N', 'e', '4283', '3243', '5581', '1407', 'q', 'y', '6685', 'v', 'c', '5995']

Output: 27194


Input: Consider Input: ['r', 'X', '7435', '5299', 'Z', '5873', 's', 'I', '6655', '9225', 'o', '7561', '4909', 'S', 'd']


Output: 46957