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:
['S', 'D', '3101', '4967', '8197', '5025', '4257', 'S', 'X', '7641', 'n', '6775', '4719', 'o', '2821', 'x', '5605', '2181']
answer:
55289


question:
['4509', '4165', '8651', '8057', 'a', '2241', 't', 'i', 'q', 'S', '5149', 'J', 'j', '1373', 'W', 'X', '235', 'm', '3225']
answer:
37605


question:
['6823', 'm', '395', '1687', '9851', '9359', 'o', '1443', '5647', '203', 'a', '2371', '9307', 't', '1537', 'N']
answer:

48623