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:
['2915', '4443', 'Z', '3409', '1417', 'H', 'T', 'u', '3373', 'U', '115', 'R']
answer:
15672


question:
['4159', 'H', 'h', 'W', 'w', 'i', 'G', 'l', 'j', '5467', '9219', 'j', 'q', 'n', '5465', '6197', 'J', 'y']
answer:
30507


question:
['6409', '1187', 'Y', '3905', '6295', '8737', '5407', '3525', 'N', '9425', 'v']
answer:

44890