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: ['L', 'w', '2783', '6993', 'd', '9173']

Answer: 18949


Question: ['G', 'o', 'g', 'I', 'S', '9193', 'G', 'C', '2481', '435', 'm', '1005', '5605', '6501', 'D']

Answer: 25220


Question: ['2461', 'v', 'G', 'B', '541', '3691', 'h', 'y']

Answer:
6693