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: ['G', 'Z', '4819', '9763', '9987']

A: 24569
****
Q: ['D', 'T', 's', 'S', '2531', 'B', 'U', 'W']

A:
2531
****