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:
['2097', '7815', 'f', '1705', '7553', 'C', 'n', '7091', '1253', 'z', '9229', 'H', 'N', '6481', 'H', 'M', 'G', '4527', '8537']
answer:
56288


question:
['887', '8133', 'X', '2253', '8461', 'I', '5425', 'Z', 'z', 'r']
answer:
25159


question:
['q', '9203', 'x', '79', 'B', 'J', '9531', 'D', '8791', '8111', '3365', 'e', '7481', '8531', '8775', '8047', '693', '8105']
answer:

80712