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: ['7465', 'G', '105', 'A', '3987', 'O', '7385', 'C', '8957']

Answer: 27899


Question: ['J', '5149', 'H', 'L', 'm', 'h', '3863', 'n', 'z']

Answer: 9012


Question: ['7483', '2853', '5605', '7175', 'M', '7621', 'q', 'i', '7021', '223', '9861', 't', '8479', '431']

Answer:
56752