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:
['5899', '229', 'm', '3347', 'k', 'q', 'g', '2755', '8727', '2035', '823', '6835', '9271', 'Q']
answer:
39921


question:
['P', '237', 'X', '8893', '7931', 'F', '8359', 'S', '6931', '6953', 'r']
answer:
39304


question:
['C', '1841', '2177', '7299', 'q', '3575', '6535', '2149', 'W']
answer:

23576