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.

['9403', '2607', 'G', '7901', 'K', '7967', 'a', 'n', '1967', 'x', 'g', '1081']
30926

['1869', 'q', '5919', 'D', '7733', '2641', 'h', '1327']
19489

['Q', '7643', '7373', '5481']

20497