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:
['3469', 'n', '5561', '8597', '921', '4737', 'r', 'P', '7127', '3651', 'D', '1703', 'y']
answer:
35766


question:
['r', '6537', '3001', '7879']
answer:
17417


question:
['L', 'u', 'Z', '8615', 'F', 'j', '1457', 'B', 'p', '6927', '7577', 'x', 'X', '8271']
answer:

32847