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:
['u', 'i', 'z', 't', '9617', 'd', '3255', 'w', 'S', '3041', '7451']
answer:
23364


question:
['K', 'm', '41', '9039', 'N', '8905', '4851']
answer:

22836