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]: ['6469', '3027', 'Z', '3353', 'a', 'S', '3879', '8471', 'H', 'I', 'y', '2661', '9007', 'D']
[A]: 36867


[Q]: ['5467', '3013', '8325', '4005', 'J', 'V', '395', '7477', 'E', 's', '1337', 'g', 'v', '8569', '9757', 'x', '3909', '2983', 's', '7917']
[A]: 63154


[Q]: ['P', '2651', 'x', 'N', 'k', 'r', 'B', '5521', '5147', 'F', 'C', 'P', '3943', '2345', '405']
[A]:
20012