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:
['4241', 'E', '1807', '2877', '5125', '7625', 'S', '401', '5081', 'u', 'R', 'F']
answer:
27157


question:
['4437', '1265', '1519', 'K', 'Q', 'b', 'n', 'J', '6631', 'K', 'q', 'D', 'U', 'u', '3653', '5169', 'L', 's']
answer:
22674


question:
['d', '1489', '883', '8821', 'a', '4479', 'N', 'k', '3515', 'm', '9963', 'T', '285', 'K', 'M', 'u', '4325', 'U']
answer:

33760