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: ['p', 'V', '673', '8483', 'S']

Answer: 9156


Question: ['m', 'g', '7251', '5873', '59', '7345']

Answer: 20528


Question: ['6153', '6407', '9783', 'A', '8623', '71', '8371', '8995']

Answer:
48403