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:
['8109', '6811', 'f', 'l', '5869', 'm', '4657', 'y', 'P', '7983', 'o', 's', 'i', 'm', '2141', '4497']
answer:
40067


question:
['A', '6323', 'T', 'H', 'M', 'S', 'D', 'r', 'v', '8169', '7649', '5149', 'x', '6275']
answer:
33565


question:
['Q', 'r', 'c', 'b', '3247', '2025', 'u', '3431', 'o', 'j', '2763', '3185', '1221', 'j', 'i', 'Y']
answer:

15872