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:
['x', '1305', 'b', '8193']
answer:
9498


question:
['W', '3561', '4631', '8379', 'W', '6857', '2723', '5393', 'h', 'g', 't', 'I', 'R', '2321', 'l']
answer:
33865


question:
['5509', '9925', '339', 'v', '9951', 'u', 'I', 'T', 'p', 'D', '5907', '6573', 'L', '4195', '8627']
answer:

51026