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: ['q', 'N', 'y', '7859', 'u', '2861', '4151', 'Q', 'x']

Answer: 14871


Question: ['6551', 'm', '3941', 'F', 'K', 'u', '7981', '9581', 'X', 'M', 'N', 'e', 'G', 'i']

Answer: 28054


Question: ['K', 'J', 'i', '893', '1391', 'K', '7577', 't', 'D', '6213']

Answer:
16074