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.
--------
Question: ['k', 'a']

Answer: 0


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

Answer: 22674


Question: ['I', '9455', 'i', '3265', '2523', '4373', 'b', 'E', '4481', '7855', '2753', 'h', 'C', '6785']

Answer:
41490