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.

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

A: 31031
****
Q: ['q', '8155', 'L', 'v', '2657', 'X', 'v', '2353', '151', 'R', '967', '4327']

A: 18610
****
Q: ['2301', '5821', '1489', '8849', 'f', 't', '1065', '3891', 'O', '8975', '7439', 'k', '1739', 'X', 'o']

A:
41569
****