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:
['5233', 'i', 'Z', 'v', '4531', 'j', '61', '1725', '5915', '1677', 'F', 'K', 'M', 'Z']
answer:
19142


question:
['6019', '1467', '3415', '7785']
answer:
18686


question:
['U', '1219', 'k']
answer:

1219