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: ['q', '6631', 'b', '4207', '7523', '9853', '9203', 'P', '5029', 'b', '2319', '4717', '2485']

Answer: 51967


Question: ['3121', 'j']

Answer: 3121


Question: ['O', '329', '481', '1647', '6043', '9169', 'z', '7893', 'Y', '4329', '1893', 'b', 'E', '8551', '4953', '8425']

Answer:
53713