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: ['2729', 'W', 'i', '9073', '343', 'j', '2329', '9159', '4825']

Answer: 28458


Question: ['a', 'm', '3205', '1869', '1117', 'K', '5785']

Answer: 11976


Question: ['2441', 'f', 'D', 'F', '9655', 'p', 'l', 'A']

Answer:
12096