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:
['A', '9785', '1739', 'x', '2389', 'O', 'J', '1407', '9067', 'x', '9747', '2485', '4631', '6021', '4077', '2779', 'V', '2449', '7401']
answer:
63977


question:
['v', 'a', 'O', 'S', 'r', 'T', 'r', 'K', 'K', '7781', '1749']
answer:
9530


question:
['1203', '2067', '5601', 'i', 'k', 'A', '5255', '5829', 'l', 'h', 'S', '7185', 'R', 'z', 't', 'N', 'K', 'X', 'b']
answer:

27140