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:
['1815', 'U', '869', 's', '1847', 'C', '2711', 'S', 'i', '7949', '4477', '5093', 'D', '8661', '3835', '4087', '73', 'V', '3149', 's']
answer:
44566


question:
['2691', '3861', '7087', '4661', '6527']
answer:
24827


question:
['G', 'G', '2749', '7453', '9671', 'O', '9883', 'w', 's', 'y', '4297', '5691', 'X']
answer:

39744