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: ['D', 'G', '9895', '143', '37', 'S', '1539', 'x', 'a', 'x', 'B', 'i', '9719', '839']

Output: 22172


Input: Consider Input: ['9869', '7701', 'H', 'o', 'v', '1431', 'O', 'L']

Output: 19001


Input: Consider Input: ['Y', '263', '641', '1163', 'p', 'r', 'L', '4425', 'C', '7585']


Output: 14077