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]: ['D', '9679', 'e', '5537', 'G', 'l', '2653', 'a', 'Y', '8467', 'q', 'L', '7239', 'O']
[A]: 33575


[Q]: ['4177', 'd', 'b', 'm', 'f', 'R', '797', '7905', '4355', '7515', '9801', 'F', 'R', '9125', '8445', 'k', 'K', 'K']
[A]: 52120


[Q]: ['X', 'R', '6821', 'o', 'G', '9053', 'B', '1663', '2541', 'H', '9141', 'V', 'E', '7553']
[A]:
36772