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:
['9989', 'B', 'E', '5181']
answer:
15170


question:
['6055', 'v', '9455', 'A', '6817', 'D', '9339', 't', 'K', '1993']
answer:
33659


question:
['s', 'o', 'o', 'Y']
answer:

0