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:
['8529', '2657', '1599', 'b', '8187', '7005', '7481']
answer:
35458


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


question:
['M', 'R', '5611', 'q', '3737', '1995', '1439', '8185', 'f', '785', '6023', 'z', '8687', '8515']
answer:

44977