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:
['d', '5571', '6455', '4287', 'I', 'U', 'M', '8303', '8893']
answer:
33509


question:
['3351', '6445', 'Y', '8455', 'V', 'z', 'a', 'V', 'S', '8551', '4101', 'q', '8743', '5999', '7155', '3825', '2241', '9957']
answer:
68823


question:
['B', 'z', 'q', '2329', 'b', 'j', '1703', 'm', '3491', 'r']
answer:

7523