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:
['k', '1489', 'x', '6543', 'I', 'l', 'D', '6299', '1473', 'a', '7661', 'z', 'E', 'Z', 'U', '3671', '2873', 'e', 'p']
answer:
30009


question:
['z', 'T', 'Y', 's', 'j', '585', '7833', '2601', '8057', 'S', '7037', '5799', '4477', '5377', '6301', 'P', 'm', '9431', 'f']
answer:
57498


question:
['9883', 'H', 'J', 'j', 'O', 'E', 't', 'y', '3809', '2403', 'S', 'g', 'k', '6731', '1501', 'h', '1051', 's', '3183']
answer:

28561