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: ['2469', 'c', '6931', 'a', '2167', '9493', '9403', '4123', '4949', 'R', 'V', 'h', '315', 'T', '9411', 'M', '1329', '8217', '6105', 'Y']

Answer: 64912


Question: ['V', 'O', '1309', 'm', '9333', '8283', 'Z', 'K', 'X', 'w', '9855', '9075', '2013', '8485', '9973', '8779']

Answer: 67105


Question: ['R', 'b', 'V', '3005', '1807', '3091', 'q', 'u', 'W', 'h', 'o', 'B', 'K', '6615', 'F', 'V', '9767', '6783']

Answer:
31068