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: ['S', 'W', '2171', '6405', 'h', 'C', '1597', '7109', 'Q', 'p', '2747', 't', 'J', 'q', '1883', 'v', 'O']

A: 21912
****
Q: ['q', 'N', 'y', '7859', 'u', '2861', '4151', 'Q', 'x']

A: 14871
****
Q: ['O', '7791', '1019', '2755', 'b', 'A', '5137', 'j', '4359', '7753', 'X', '2473', 'G', 'g', '9575', '2777', '3925', 'E', '7959', 'x']

A:
55523
****