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

['K', 'p', '97', 'R', '2999', 'u', '7307', '6033', '6431', 'm', 'T']
22867

['S', 'H', 'l', '9235', 's', '4741', '9745', '6129', '2179', 'J', '3937', 'm', '9707']

45673