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: ['u', 'i', 'z', 't', '9617', 'd', '3255', 'w', 'S', '3041', '7451']

Answer: 23364


Question: ['a', 'q', '4085', '6327', '6869', 'Z', 't', '7057', '1965', 'p', 'o']

Answer: 26303


Question: ['V', '7751', 'x', '1137', 'l', '7703', '7465', '6827', 'U', '2531', 'B', '693', '883', 'K', '3831', 't']

Answer:
38821