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]: ['Q', '8317', '8989']
[A]: 17306


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


[Q]: ['P', 'd', '363', 'e', 'K', '6219', '7967', '6495', '5589']
[A]:
26633