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: ['5233', 'i', 'Z', 'v', '4531', 'j', '61', '1725', '5915', '1677', 'F', 'K', 'M', 'Z']

Output: 19142


Input: Consider Input: ['X', 'f', 'p', 'R', 'N']

Output: 0


Input: Consider Input: ['M', '9235', 'H', 'Z', '5957', 'j', 'A', 'w']


Output: 15192