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:
['B', 'u', '9227', 'b', '8767']
answer:
17994


question:
['4701', 'b', 'i', 'B', 'z', '7837', 'W']
answer:
12538


question:
['y', '41', 'r', '8211', '9085', 'F', 's', 'w', 'k', 'r', '6705', 'f', 'G', 'J', 'h', '3327', 'b', '969', '3313']
answer:

31651