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: ['1709', 'S', 'w', '7725', 'Z', '7755', '8081', '897', 'N', '4449', 'F', 'F', 'M', 'y', 'B', 'h', 's', 'l', 's', '415']

Output: 31031


Input: Consider Input: ['2237', '2597', '2593', 'Y', '5345', 'g', 'l', 'I', 'p', 'u', 'L', 'T', '617', '9759', 'b', 'w', '7097', '9863']

Output: 40108


Input: Consider Input: ['x', '7663', '7645', '6283', 'K', '3347', '6893', '9355', 't', '3987', '5385', 'x', 'B', 'B', 'n', 'q', 'M', '5947', '6697']


Output: 63202