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:
['4601', '6021', '3005', 'I', 'f', '4631', 'Q', 'd', '8041', 'D', '8067', '7383', '757', 't', 'd', 'n', '2275', 'p', 'm', '6021']
answer:
50802


question:
['x', '1305', 'b', '8193']
answer:
9498


question:
['5863', '3587', 'M', 'e', '645', '8445', '9987', 'K', '7771', 'C', '7043', '9775', 'd', '3905', 'v', 'x', '5499', '3671', '4429']
answer:

70620