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: ['1815', 'U', '869', 's', '1847', 'C', '2711', 'S', 'i', '7949', '4477', '5093', 'D', '8661', '3835', '4087', '73', 'V', '3149', 's']

Output: 44566


Input: Consider Input: ['g', 'M', 'I', 'V', '3377', '7309', '3617', 'v', '9207', 'k', '387', 'g', 'C', '4785', '1527', 'O', 'A']

Output: 30209


Input: Consider Input: ['3667', '1523', '3203', 'n', '3129', 'U', '7997', 'd', 'D', 'F']


Output: 19519