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: ['j', 'f', '3831', 'B', 'D']

Output: 3831


Input: Consider Input: ['9403', 'u', '4159', 'w', '3467']

Output: 17029


Input: Consider Input: ['e', 'H', 's', '6193', '3621', '5671', 'o', '2007', 'E', '1767', 'K', '3551']


Output: 22810