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:
['9509', 'o', 'l', '9873', 'h', 'N', '2059', '8595', 'D', 'L', '5913', 'o', '1443', 'C', 'y', 'K', 'J', 'a', 'X', 'E']
answer:
37392


question:
['7755', '8383', 'y', 'k', '4869', '2809']
answer:
23816


question:
['u', 'r', 'C', 'G']
answer:

0