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:
['61', '5695', 'u', '253', 'n', '1035', 'd', '3017']
answer:
10061


question:
['4949', '2459', 'n', 'f', 'n', 'v', '8421', '1519', '4859', 'c', '9923', '2829', 'K', '4937', 'W', 'R']
answer:
39896


question:
['z', 'e', 'Q', 'a', 'd', '4401', 'U', '317', '6641', '9837', '4077', 'v', 'T', '2313', 'H', 'Y', '6999']
answer:

34585