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:
['U', '9593', '2079', '5959', 'T', '5849', 'w', 'b', '9743', '6689', 'k', 'J']
answer:
39912


question:
['191', 'R', 'Q', '7809', '4851', 'b', 'e', 'H', 'E', 'I', 'r', 'A', 'g', 'e', 'g', 'I', 'j', 'f', '7287']
answer:
20138


question:
['c', '3799', '6313', '6159', 'k', '309', '1735', 'd', 'n', '5847', '8779', '4701', 'f', 'G', '1451']
answer:

39093