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


question:
['1057', '3937']
answer:
4994


question:
['o', 'R', 'c', 'i', 'F', 'X', 'I', '2313', '2807', 'h', '8701']
answer:

13821