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]: ['w', 'I', 't', '813', 'K', '5785']
[A]: 6598


[Q]: ['4997', '5005', '6773', 'q', 'K', '8391', '7303', 'K', 'N', '5417', '8573', 'z', '8653', '8343', 'm', 'L', '1587', 'p', '5323']
[A]: 70365


[Q]: ['7827', 'h', '1727', '5337', 'I', '3813', '2949', '9957', '9553', '8549', 'l', 'v', 'U', 'D', '9641', '6469', '333']
[A]:
66155