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:
['F', 'z', '1159', '345']
answer:
1504


question:
['3557', '3345', '307', '9791', '1897', 'O']
answer:
18897


question:
['d', '5003', 'r', '5973', '983', '261', 'd', '3965', 'd', '3055', 'B']
answer:

19240