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: ['4529', '7465', 'S', 'Z', 'v', 'w', '5791', '3363', '2643']

Answer: 23791


Question: ['x', '1887', 'E', '3995', '5677', '2749', '9951']

Answer: 24259


Question: ['4847', 'Q', '3273', 'I', '2269', '4865', '6897', '1025', '8909', '4333', '9423']

Answer:
45841