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: ['I', '1941', '2423', '3381', 'J', '6589', 'h', 'D']

Answer: 14334


Question: ['6907', '9123', 'L', '8871', 'q', 'C', 'U', '7403', 'F', '3827', '3951', '8879', '2865', 'x', '6175', 'T', '1147']

Answer: 59148


Question: ['2871', '1337', '3771', '4671', 'l', '3785', 'V', 'z', 'R', 'u', '6097', 'R', '4297', 'd', '6339', 'Y', 'V', '5873', '7399']

Answer:
46440