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.

['4437', '1265', '1519', 'K', 'Q', 'b', 'n', 'J', '6631', 'K', 'q', 'D', 'U', 'u', '3653', '5169', 'L', 's']
22674

['Q', '8317', '8989']
17306

['7411', '4995', 'w', 'k', '7749', 'B', 'V', '271', '6305', 'J', '9579', '3693', 'T']

40003