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', 't', '4837', 'F', '2367', '1867', '8361', 'm']
17432

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

['2883', 'z', 'c', 'H', 'O', '1737', '5055', 'P', 'd', '6955', 'w', '5235', '3617']

25482