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: ['t', 'Q', '5189', 'g', 'c', '4685', '5309', 'W', '6729', '2843']

Output: 24755


Input: Consider Input: ['K', '4403', 'a', '3881', '4139', 'w', '1861', 'G']

Output: 14284


Input: Consider Input: ['V', 'D', '7041', '123', '197', 'u', 'Z', 'w', '3579', 'd', '5129', 'P', '1967', '9503', 'G']


Output: 27539