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: ['187', 'J', 'l', 'p', '1009', 'g', '5817', 'V', 'B', 'Z', '3329', '9253']

Answer: 19595


Question: ['2683', '4431']

Answer: 7114


Question: ['4739', '8455', '6467', '4925', 'M', 'X', '5761', '997', 'P', '7137']

Answer:
38481