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:
['A', '9979', '8723', '1131', 'i', 'p', 'M']
answer:
19833


question:
['h', '9539', '3373']
answer:
12912


question:
['1113', '5553', 'i', 'U', '5877']
answer:

12543