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: ['N', 'V', 't', 'X', 't', 'M']

Output: 0


Input: Consider Input: ['z', 'c', 'E', 'Q', '1839', 'g', 'X', 'c', '291', 'c', 'w', 'e', '5957', 'X', '6471', 'A', '8359', 'y', '3611', '5417']

Output: 31945


Input: Consider Input: ['g', '3809', 'p', 'Q', '5157', '6283', '4297', 'A', 'n', '2217', '6973', '1709', 'V']


Output: 30445