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:
['b', 'i', '7807', 'g', '1611', '6733', 'V', '561', 'C', '8575', 's', 'E', '8129', 'F']
answer:
33416


question:
['4685', 'q', 'O', 'o', '3453', 'o', 'Y', 'C', 'a', 'i', '7283', 'J', 'n', 'Q', 'i']
answer:
15421


question:
['L', '2341', 'H', '4981', 'q', '7875', 'J', 'P', 'r', '6571', '49', '4251', 'P', 'l']
answer:

26068