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: ['E', 'v', 'l', 'c', 'g', '3929', 'q', 'j']

Answer: 3929


Question: ['m', 'E', 'c', 'T', '2027', '907', 't']

Answer:
2934