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: ['4869', 'L']

Output: 4869


Input: Consider Input: ['5199', 'h', 'T', 'T', 'l', '1661', 'p']

Output: 6860


Input: Consider Input: ['9607', 'C', 'n', '6955', '9801']


Output: 26363