instruction:
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:
['7379', 'I', '2031', '8419', 'w', 'b', '9827', 'X', 'Y', 't', '3789', 'B', 'c', '6599', 'F', '6169', 'V']
answer:
44213

question:
['P', '237', 'X', '8893', '7931', 'F', '8359', 'S', '6931', '6953', 'r']
answer:
39304

question:
['r', '5757', '3127', 'S', '2829', '3415', 'q', 'V', 'S', '873', '2411', 'i']
answer:
18412