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:
['3565', 'z', '8811', 'z', 'U', '113', 'I', '1307', '135', 'V', 'P', '5183', '2505', '4863', '1113', 'A', '7575', '827', 'B']
answer:
35997


question:
['2225', '1925']
answer:
4150


question:
['4389', '9387', 'm', 'f', 's', 'U', 'q', 'Z', 'K', 'K', 'B', 'k', '3935', '3113', 't', 'V', '4167', '9629']
answer:

34620