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:
['9787', '1491', '4411', '5261', 'U', '9787', 'b']
answer:
30737


question:
['6217', 'A', '1925', 'o', '1433']
answer:
9575


question:
['x', '2835', 'X', '207', 'E', '1501']
answer:

4543