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:
['d', '4553']
answer:
4553


question:
['4529', '7465', 'S', 'Z', 'v', 'w', '5791', '3363', '2643']
answer:
23791


question:
['M', 'V', 'l']
answer:

0