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: ['4529', '7465', 'S', 'Z', 'v', 'w', '5791', '3363', '2643']

Output: 23791


Input: Consider Input: ['49', '8927', 'B', '3843', 'k', 'm', 'd', '9973', '1647', '3859', 'n', 'G', '7789', '9803', 'n', 'J', 'U', 'n', 'u', '1863']


Output: 47753