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: ['R', 'J', 'z', 'o', '1121', '7247', '8987', 'u']

Output: 17355


Input: Consider Input: ['w', '8035', 'J', '2671', '7509', '1573', '6915', '8569', '345', 'T', 'P', 's', '1341', '7823', '8671', 'm', 'Q', 's', 'N']

Output: 53452


Input: Consider Input: ['547', '1387', 'B', 'j', 'P', 'T', '9223', 'D', 'E', '1183', '2477', '2101', '3305', '245', '1645', '3193', 'D', '2723']


Output: 28029