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: ['m', '6153', 'A', '6173', 'x', '7527', '8501', 'g', 'r', 'K', 'I', '3103', '8347']

Answer: 39804


Question: ['B', 'K', '9399', 't', '5541', 'w', '1939', '7841', 'q']

Answer: 24720


Question: ['l', 'k', '7033', 'P', 'Z', '1685', '1891', 'j', 'y', 'Y', '5039', '2365', 'm', 'H', '7723', '3295']

Answer:
29031