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', '6383', 'P', '8455', '3881', '5821', 'e', 'v', '1421', 'Q', '6377', '3157', '6407', 'q']
answer:
41902


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


question:
['u', 'X', 'n', '5065', '9115', '387', 'A', '5955', '5193', '6999', '7805', 'h', 'L', 'W', 'g', '6397']
answer:

46916