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:
['a', 'q', '4085', '6327', '6869', 'Z', 't', '7057', '1965', 'p', 'o']
answer:
26303


question:
['z', '6859', '9003', 'Y', '303', '2887', 'x', '7649', '8695', '2517', '9247', 'o', 's', '259', 'n', 'S', '8267', 'q', 'n']
answer:

55686