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: ['s', 'M', 'U', '5383']

Output: 5383


Input: Consider Input: ['7459', '491', '7823', '6965', 'H', '109', 'R', 't', '3959', '2821', 'R', '2807', 'o', 'v', '1305', 'a', '1411', 'r', '3669']

Output: 38819


Input: Consider Input: ['3881', '2927', 'o', 'j', '9463', '797', 'M', 'q', '5603', '1079', 'h', '6265', '1733']


Output: 31748