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: ['k', '4991', '7289', '4355', 'I', '8415', '5175', '5329', 'G', 'a', '7193', 't', '8821', 'j', '7239', '405', 'y', 'O', '9881', 'w']

A: 69093
****
Q: ['8755', 'A', '2893', '6703']

A: 18351
****
Q: ['K', '8287', 'y', 'E', 'r', 'p', '2821', '4593', '8819', 'a', 'E', '2577', 'f']

A:
27097
****