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:
['G', 'Z', '4819', '9763', '9987']
answer:
24569


question:
['a', 'j', 'v', '619', 't', 'a', '5777', 'x', 'R', 'P', '8897', 'j']
answer:
15293


question:
['f', '6927', 'G', '3557', '7287', 'q', 'Z', '3713', 'h', 'R', 'l', '6317', 'N', '3311', 'j', 'j', 'K']
answer:

31112