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: ['c', 'd']

Output: 0


Input: Consider Input: ['h', '9539', '3373']

Output: 12912


Input: Consider Input: ['9921', 'N', 'h', '5291', '5579', 'h', 'u', '6683', 'j', 'u', 'B', '8323', 'k']


Output: 35797