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: ['6645', 'k', '4879', 'N', '113', 'L', 'x', '8365', 'v', 'A']

Answer: 20002


Question: ['211', '7561', '8725', '6139', 'I', '6585', '4231', 't', '2983', 'T', 'S', '9569', 'R', 'b', 'N', 'X', '9009']

Answer: 55013


Question: ['5881', '7861', 'l', 'm', 'W', 'Q', '8521', 'K', '3431', 'K', '8147', 'J', 'T']

Answer:
33841