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:
['x', '9895', 'r', 'H', 'C']
answer:
9895


question:
['I', 'J', 'K', 'D', '5961']
answer:
5961


question:
['6199', '1895', '1001', 'j', '3557', '7241', 'P', '1363', 'R', 'G', 'l', '9139', 'N', 'h', 'K', '8079']
answer:

38474