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.

['6255', '8457', 'V', 'z', '4405', 'X', '9267', '5329', 'I']
33713

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

['Q', 'E', '625', 'u', '1025']

1650