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: ['r', '3139', 'C', 'L', '7335', 'v', '9861', 'F']

Output: 20335


Input: Consider Input: ['89', '5965', '9463', 'k']

Output: 15517


Input: Consider Input: ['c', '3295', '6193', '809', 'p', 'K', 'n', 'W', '2279', '4471', '8265']


Output: 25312