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', 'N', 'y', '7859', 'u', '2861', '4151', 'Q', 'x']
answer:
14871


question:
['s', 'M', 'U', '5383']
answer:
5383


question:
['u', '5037', '2471', '9995', 'o']
answer:

17503