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:
['U', '9593', '2079', '5959', 'T', '5849', 'w', 'b', '9743', '6689', 'k', 'J']
answer:
39912


question:
['3013', '3955', 'f', '1183', '5111', '9509', '2351', '7087', 'f']
answer:
32209


question:
['C', 'p', 'Z', '1161', '2471', 's', '7719']
answer:

11351