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


question:
['57', '9977', '2657', 'p', '9573', '7745', '4755', 'U']
answer:
34764


question:
['K', 'n', '107', 'a', 'r', '9445', '5265', '1223', 'E', 'I', 'y', '3121', '9839', '5967', 'Z']
answer:

34967