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: ['2175', '4539', 'L', 'T', 'q', '2407', 'F', 'V', 'b', '9475', '2279', '4469', '6231']

Output: 31575


Input: Consider Input: ['e', '6633', '131', '7459', '3733']

Output: 17956


Input: Consider Input: ['9603', '8063', 'A', 'Z', '7931', '5033', 'l', 'l', '6395', '4253', 'y', 'i', 'p']


Output: 41278