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.
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Question: ['4089', '2385', 'E', 'K', '259', '295', '6649', '8645', 'n', '2577', '2683', '9041', 'Q', 'm', '4237']

Answer: 40860


Question: ['2585', '3043', 'w', '7697', '53', 't', 'A']

Answer: 13378


Question: ['f', '4517', '901', 'r', '5807']

Answer:
11225