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: ['o', '445', '2601', 'h', 'V', 'C', 't', 'o', 'H', '3707', '7601']

Answer: 14354


Question: ['6669', 'n', 't', 'N', 'x', '8153', 'W', 'v', 'B', '3181', 'y', 'e', '3491']

Answer: 21494


Question: ['3477', '7159', 'Q', '1073', 'X', '4407', '693', '5765', 'o', '361']

Answer:
22935