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:
['o', 'J', 'B', '7765', '7781', '5513', '8721', 'u', '9557', 'C', 'A', '1281', '6565', 'H', '5559', '1695', '7577']
answer:
62014


question:
['135', 'a', 'X', '8067', '8447', '4009', '4221', 'o', 'A', 'x']
answer:
24879


question:
['Q', '1669']
answer:

1669