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.

['b', '5689', '119', 'p', 'P', 'J', 'w', 'm', '7397', 'Y', '447', 'O', 'p', '319', 'H', 'U']
13971

['Q', '2271', '1803', '2363']
6437

['6421', 'x', 'E', 'X', '2827', '3397', 'c', 'X', '4805', '883', '8161', '2297', '8943', 'Q', 'I', '5197']

42931