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:
['A', '771', 'Q', 'b', '9929', '4991', 'q', '9863', '4363', '5721', 'C', '991', 'j', 'r', 'Q', 'B', 'K']
answer:
36629


question:
['D', '1611', 'w', '8825', '8987', '3021', '9019', 's', '87', '9283', '5717', 'f', '1503', '6593', '8533', '785', 'g']
answer:
63964


question:
['2845', '357', 'r', '7771', '7027', '4579', '3441', '9287', '7507', '377', 'C']
answer:

43191