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: ['G', 'e', 'R', '4427', '3401', '3065', 'I', '2781', '6829', '5261']

Answer: 25764


Question: ['q', 'I', 'E', 'M', 'T', 'i', '8719', 'r', 'V', '9759', 'I', '1793', 'Q', 'P', '5263', 'I', 'O', '8603', 'y']

Answer: 34137


Question: ['x', '2535', 'g', 'g', '759', '1329', '7423']

Answer:
12046