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:
['5289', '1701', '5925', '7973', 'F', 'V', 'y', '5903', 'i']
answer:
26791


question:
['4463', '489']
answer:
4952


question:
['U', '8057', 't', '5419', '2157', 'j', 'A']
answer:

15633