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:
['2417', '6671']
answer:
9088


question:
['57', '9977', '2657', 'p', '9573', '7745', '4755', 'U']
answer:
34764


question:
['L', 'i', '9225', 'w', '5365', '8077', '2733', 'W', '8493', 'B']
answer:

33893