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: ['P', '237', 'X', '8893', '7931', 'F', '8359', 'S', '6931', '6953', 'r']

Output: 39304


Input: Consider Input: ['q', 'I', 'E', 'M', 'T', 'i', '8719', 'r', 'V', '9759', 'I', '1793', 'Q', 'P', '5263', 'I', 'O', '8603', 'y']

Output: 34137


Input: Consider Input: ['5599', 'I', '5055', '4105', '263', '4677', 'M', '5269', 'k', 'n', '8373', 'i', '4715', 'O', 'd', '8187', 'F', '7465', '8103']


Output: 61811