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

['z', '9173', 's', '8937', 'h', '1881', '7929', 'b', '2441']
30361

['693', '1201', '5723', 'd', '9295']

16912