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:
['W', 'O', 'c', 'r', 'E', 'w', '9811', '6421', '3543', '4293', '8255', 't', '229', '745', 'w', 'p', '6861', '5305', 'h']
answer:
45463


question:
['y', 'p', '3553', '2155', 'b', 'R', 'j', 'V', 'U']
answer:
5708


question:
['n', '3983', 'g', 'u']
answer:

3983