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:
['a', 'f', '2185', 'N', '6381', '6429', '7499', 'd', '757', 'k', 'k', 'b', 'N', '2697', 'A', '8037']
answer:
33985


question:
['u', 'i', 'z', 't', '9617', 'd', '3255', 'w', 'S', '3041', '7451']
answer:
23364


question:
['8801', '8543', '4327', '7351', '8233', '231']
answer:

37486