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:
['K', 'p', '97', 'R', '2999', 'u', '7307', '6033', '6431', 'm', 'T']
answer:
22867


question:
['D', 'm', 'P', '2433', '6731']
answer:
9164


question:
['z', 'v', 'Q', '8673', '5589', 'U', '2167', 'Y', 'r', 'E', '5365', 'L', '7041', 'f', 'k', 'm', 'A', 'g', '8779']
answer:

37614