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: ['D', 'K', 'n', 'd', 'i', 'U']

Output: 0


Input: Consider Input: ['m', 'e', 'W', 'N', '4459', '693', '3765', '2641']

Output: 11558


Input: Consider Input: ['7633', 'Z', 'e', '7597', 't', '6241', 'd', '3295', 'd', '4911', '8025', 'l', 'u', '8147', 'c']


Output: 45849