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: ['1395', '3605', '6001', 's', 'h', 'T', 'K', 'X', '9413', 'X', '5099', 'c', 'f', 't', 'S', 'f', '4651']

Answer: 30164


Question: ['Q', '8317', '8989']

Answer: 17306


Question: ['B', 'l']

Answer:
0