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:
['q', '8155', 'L', 'v', '2657', 'X', 'v', '2353', '151', 'R', '967', '4327']
answer:
18610


question:
['7831', 'O', '6017', 'v', 'U', '5761', 'Q', 'Q', 'w', '8465', 'Z', 'P', 'i', 'u', '1635', 'n', '8471', '4213']
answer:
42393


question:
['W', '5231', 'q', 'q', 'k', 'v', '3803', '4697', '3353', '7341', '9677', '4573']
answer:

38675