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:
['6469', '3027', 'Z', '3353', 'a', 'S', '3879', '8471', 'H', 'I', 'y', '2661', '9007', 'D']
answer:
36867


question:
['6957', '4603', '5299', '8451', '9803', 'b']
answer:
35113


question:
['3073', '785', 'u', 'd', '6449', 'l', 'H', 'E', 'v', 'E', '6165']
answer:

16472