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:
['9201', '5685', 'v', 'w', 'v', 'r', 'Y', 'm', 'q', 'e', 'P', '7595', 'c', 'W', 'd', '9985', 'V', '3719']
answer:
36185


question:
['B', 'K', '9399', 't', '5541', 'w', '1939', '7841', 'q']
answer:
24720


question:
['4761', '8515', '2715', 'b']
answer:

15991