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.

['2175', '4539', 'L', 'T', 'q', '2407', 'F', 'V', 'b', '9475', '2279', '4469', '6231']
31575

['8353', 'f', '1799', '6985', '2975', 'J', '9105', 'f', 'v', 'C', 'V', '9327', '3015', 'e', 'h', '439', '4969', 'c']
46967

['k', 'E', 'A', 'a', 'r', 'y', 'E']

0