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:
['5947', 'n', '9431', '7629', '7643', 'N', '141', '2353', 'l', 'F', '9665', '9489', 'X', '4905', 'H', 'L', '985']
answer:
58188


question:
['3839', 'D', '4741', 'L']
answer:
8580


question:
['4423', 'l', '5113', 'P', '493', 'p', '4215', 't', '9355', '5183', 't', 'O', 'p', '9073']
answer:

37855