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: ['61', '5695', 'u', '253', 'n', '1035', 'd', '3017']

Answer: 10061


Question: ['8353', 'f', '1799', '6985', '2975', 'J', '9105', 'f', 'v', 'C', 'V', '9327', '3015', 'e', 'h', '439', '4969', 'c']

Answer: 46967


Question: ['V', '2371', 'B', '9871', '2515', '8175', '7287']

Answer:
30219