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', '9751', '4367', 'l', 'N', '5125', '8751', '7507', 'y', 'K', '6127']

Output: 41628


Input: Consider Input: ['t', 'v', 'B', 'Y']

Output: 0


Input: Consider Input: ['5477', 'r', '4403', '1249', '5973', '1219', '1001', '3055', '4747', 'x', 'r', '3891', '8831', '8701', 'm']


Output: 48547