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]: ['J', 'S', 'S', 'U', 'w', '7691', '7529', 'B', '3861', '4557', 'd', '569', '1547']
[A]: 25754


[Q]: ['3629', '8785', '9537', '8479', '3523', 'c', 'C', '5093', '2405', 'y', '1145', '8987', 'f']
[A]: 51583


[Q]: ['F', 'x', '8061', '6871', 'c', '5749', 'M', '1119', '9111', '7035', 'a', '1901', 'D']
[A]:
39847