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:
['6723', '1', '6357', '1497', 'A', 'p', 'N', 'T']
answer:
14578


question:
['x', '9895', 'r', 'H', 'C']
answer:
9895


question:
['H', 'W', '6571', 'I', '7521']
answer:

14092