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: ['W', 'c', 'P', '425', '4133', 's', '1831', '883', '2531', '681', 'U', 'B', 'H', '237', '4245']

Output: 14966


Input: Consider Input: ['R', '9751', '4367', 'l', 'N', '5125', '8751', '7507', 'y', 'K', '6127']

Output: 41628


Input: Consider Input: ['p', 'q', 'R', '9871', 'R', '2237', 'G', 'D', 'a', '3047', 'd', '5213', '2429', '2559', 'Z', '2373', 's', '1677', 'R']


Output: 29406