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.

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

[EX Q]: ['N', 'e', '4283', '3243', '5581', '1407', 'q', 'y', '6685', 'v', 'c', '5995']
[EX A]: 27194

[EX Q]: ['x', '4483', '8891', '8681', '8081', 'y', '7811', '4133', '4621', '2381', 'M', 'l', 'w', 't', 'y', '8141', '9283']
[EX A]:
66506