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:
['D', 'R', 'Y', '4929', 'P', '7929']
answer:
12858


question:
['7465', 'G', '105', 'A', '3987', 'O', '7385', 'C', '8957']
answer:
27899


question:
['8073', '6319', '6999', '4355', 'L', '3025', '8023', 'q', 'e', '4287', 'd', '2203', '5269', 'L', '1735', '607', '7553']
answer:

58448