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:
['211', '7561', '8725', '6139', 'I', '6585', '4231', 't', '2983', 'T', 'S', '9569', 'R', 'b', 'N', 'X', '9009']
answer:
55013


question:
['O', 'x', '999', 'e', '8113', 'u', 'g', 'R', 'S', '4985', 'c', '5571']
answer:

19668