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:
['29', 'N', '5061', '7191', 'z', '8367']
answer:
20648


question:
['8609', '8045', '2517', '3821', 'x', '3895', 't']
answer:
26887


question:
['L', 'l', 'm', 'e', '7971', '9245', '8773', '5841', 'd', 'C']
answer:

31830