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:
['Q', '9787', '7533', '9489', 'C', '1753', '5121', '1405', '9267', '4815', 's', '5887']
answer:
55057


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


question:
['4467', 'F', '4101', 'W', 'A', '305', 'Y', '7005', '5775', 'Z', 'f']
answer:

21653