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:
['8609', '8045', '2517', '3821', 'x', '3895', 't']
answer:
26887


question:
['4241', 'E', '1807', '2877', '5125', '7625', 'S', '401', '5081', 'u', 'R', 'F']
answer:
27157


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

25159