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: ['Y', 'X']

Output: 0


Input: Consider Input: ['4425', 'x', '1959', 'C', 'c', 'D', 'M', '8317', 'q', 'x', '4277', 'N', 'z', 'I', '1921', 'o', 't']

Output: 20899


Input: Consider Input: ['x', 'U', '6589', '1701', '2601', 'i', 'E', 'p', '5517', '5699', 'g', '8087', '2955', '359', '3163', 'A']


Output: 36671