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: ['f', 'H', 'U', 'l', 'n', 'q', '2701', '339', 'X', 'H', 'O', 'q', '2313']

Output: 5353


Input: Consider Input: ['X', 'u', 'B', '269', '9089', 'M', '5175', 'K']

Output: 14533


Input: Consider Input: ['E', 'Y', '4061', '4801', 'S', 'T', 'S', 't', '2167', 't', 'y', 'N', '6935', '2025', 'T', '731', 'G', 'u', 'o', 'C']


Output: 20720