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:
['9869', '7701', 'H', 'o', 'v', '1431', 'O', 'L']
answer:
19001


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


question:
['k', '619', '4453', 'n', 'u', 'l', 'L', '3913', 'H', 'b', 'J', 'w', '6763', 'q', '5325', '8771', 'u', 'Y', 'x', 'J']
answer:

29844