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: ['1391', '1719', '8547', 'x', 'a', 'j', '6395', 't', '3421', '6607', 'M', '1645', 'H', 'x', 't']

Answer: 29725


Question: ['95', '279', 'y', 'p', '5083', 'X', 'E', '3817']

Answer: 9274


Question: ['1751', 'h', 'k', 'x', 'F', '1091', 'Z', 'C']

Answer:
2842