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:
['W', 'O', 'c', 'r', 'E', 'w', '9811', '6421', '3543', '4293', '8255', 't', '229', '745', 'w', 'p', '6861', '5305', 'h']
answer:
45463


question:
['D', 'P', '9951', '2897', 'V', 'C', 'B', 'H', 'c', 'h', '2843', 'a']
answer:
15691


question:
['6255', '9981', 'x', '5427', '5135', 'c', 'q', 'u', '8067', 'z', 'I', '6485', '5399']
answer:

46749