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:
['F', 'v', 'G', '6023', 'M', 'Q', 'A', '8477', '2079', 'A', '813', 'C', '3479', 'G', '1977', '5569', '8749', 'Y']
answer:
37166


question:
['V', 'm', 'J', 't', '261', 'L', 'p', 'j', 'g']
answer:

261