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:
['2577', 'B', '3059', 'S', 'l', 'T', 'Q', 'x', 'f', 'l', 'y']
answer:
5636


question:
['3451', '2325', '2511', 'i', '6159', '2291', 'e', 'l', 'P', '1177', 'o', 'T']
answer:
17914


question:
['v', 'O', '3161', '929', 'C', 'n', '3521', '5923', 'G', '1529', '7577', '3951', '9141', '2551', '3535', 'L', 'L', '8119']
answer:

49937