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:
['q', 'Y', '6021', '4045']
answer:
10066


question:
['s', 't', 'W', '163', 'v']
answer:
163


question:
['k', '6909']
answer:

6909