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: ['9403', '2607', 'G', '7901', 'K', '7967', 'a', 'n', '1967', 'x', 'g', '1081']

A: 30926
****
Q: ['3629', '8785', '9537', '8479', '3523', 'c', 'C', '5093', '2405', 'y', '1145', '8987', 'f']

A: 51583
****
Q: ['L', '8497', '7025', '441', 'K', '4217', '4001', '4435', 'l', 'h', 'L']

A:
28616
****