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: ['c', 'd']

Output: 0


Input: Consider Input: ['k', '1489', 'x', '6543', 'I', 'l', 'D', '6299', '1473', 'a', '7661', 'z', 'E', 'Z', 'U', '3671', '2873', 'e', 'p']

Output: 30009


Input: Consider Input: ['3723', 'c', '921', 'l', '3861', '1941', 'L', '5269', '8659', 'r', 'H', '1147', 's', '3331', '9743']


Output: 38595