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: ['Z', '4157', '5185', 'U', 'i', '1115', 'A', '7427', '3313', 'S']

Output: 21197


Input: Consider Input: ['S', 'D', '3101', '4967', '8197', '5025', '4257', 'S', 'X', '7641', 'n', '6775', '4719', 'o', '2821', 'x', '5605', '2181']

Output: 55289


Input: Consider Input: ['4639', '3427', '8985', 'I', '919', '3325', '2803', '7519', 'y', '4803', 'm', 'F', '2551', '9189', 'p', 'P', '3611', '2433']


Output: 54204