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:
['N', '1337', 'C', 'T', '863', 'j', '2369', 'P', 'A', 'x', '5725', '2333', 'Q', '9149', 'Q', '8529', 'N']
answer:
30305


question:
['D', 'P', '9951', '2897', 'V', 'C', 'B', 'H', 'c', 'h', '2843', 'a']
answer:
15691


question:
['i', '3777', '9367', 'F', 'n', '2745', '6351', '7757', 'v', '9017', 'M', 'g', 'f', 'P']
answer:

39014