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]: ['6921', 'a', 'U', '2821', '2111', 'h', '3937', '3697', 'd', '6309', 'q', '7961', '5287', '5375', '2721', '4523', 'V', '8633', 'c', '7643']
[A]: 67939


[Q]: ['6347', '5495', '169', '9503', 'H', '571', '6105', 'X', 'r', 'e', '7369', 'a', 'd', '6999']
[A]: 42558


[Q]: ['7081', '8009', 'S', '8319', '2417', 'y', 'J', 'V', '9899', '3087', 'J', '8025', 'p']
[A]:
46837