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:
['2577', 'B', '3059', 'S', 'l', 'T', 'Q', 'x', 'f', 'l', 'y']
answer:
5636


question:
['z', '9173', 's', '8937', 'h', '1881', '7929', 'b', '2441']
answer:
30361


question:
['8461', 's', 'Z', '531', 'J']
answer:

8992