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.
--------
Question: ['3051', 'Z', 'q', 'u', 'x', '2747', 'e', 'B', '4225', 'Q', 'R', '4629', 'F']

Answer: 14652


Question: ['6957', '4603', '5299', '8451', '9803', 'b']

Answer: 35113


Question: ['6839', '6393', 'k', '3517', '2607', 'K', 'N', '4283', '6415', '4675', 'h']

Answer:
34729