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:
['1203', '6179', '9835']
answer:
17217


question:
['2895', '8095', 'y', '1927', '4827']
answer:
17744


question:
['y', 'k', '9195', 'S', 'U', 'k', 'v', '7253', 'a', '7373', 'V', '3251', 'b', 'g', '8327', '8381', 'O', 'n']
answer:

43780