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:
['e', '9777', '1835', 'N', '2425', '1427', 'o', '4459', '9961', '3285', '5199', 'x', 'e', '7727']
answer:
46095


question:
['4145', 't']
answer:
4145


question:
['c', '4501', 'O']
answer:

4501