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:
['3809', '9401', '63', '5705', 'u', '6275', 'k', 'l', '1171', '9365', 'L', 'O', '7431', '8567', 'h', '6135']
answer:
57922


question:
['W', 'T', 'g', 'V', 'o', '3073', '5709', 's', '4913', 'C', '379', '4173', '6585', 'Z', 'X', '1973', 'v', 'y', '1135', 'm']
answer:

27940