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: ['n', 'u', '9595', 'M', 'o', 'K', '5073', 'x']

A: 14668
****
Q: ['4425', 'x', '1959', 'C', 'c', 'D', 'M', '8317', 'q', 'x', '4277', 'N', 'z', 'I', '1921', 'o', 't']

A: 20899
****
Q: ['V', '1887', 'g', 'w', '889', 'Y', 'J', 'A', 'y', '7991', 'y', '2487', 'O', 'I', 'C', '4059']

A:
17313
****