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: ['s', 'g', 'Z', '8919', 'R']

Output: 8919


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

Output: 14966


Input: Consider Input: ['V', '3609', 'p', '7053', 'z', 'X']


Output: 10662