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: ['x', 'd', '5121', 'I', '6737', '3789', '6167', 'C', '8947', 'k', '4715', '1885', 'H', 'B', '5685', 'S', '4615', 's', '7709']

Answer: 55370


Question: ['6585', '5263', '9497', '1117', 'a', 'F', 'w', '6595', '547']

Answer: 29604


Question: ['6055', '3105', 'z', 'g', '9189', '7839', 'N', 'o', '2395', '7469', 'x', '2325', '9767', '8157', 'Z', 't', '6599', '5829']

Answer:
68729