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.
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Question: ['6293', 'o']

Answer: 6293


Question: ['Y', 'X']

Answer: 0


Question: ['Y', '3551', '7073', '1777', 'u', '8331', 'g', '2255', 'f', 'T', '2209']

Answer:
25196