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.

['O', '6337', 'j', '6009', 'z']
12346

['3319', 'e', 'c', 'G', '2399', '1557', '4813', 'z', 'U', '4895', 's', '1193', 'A', 'G']
18176

['J', 'f', '4201', '217', '5431', '5111', '6595', 'u', 'f', 'D', '4289', 'O', 'p', '7487', '4259', 'h', '197']

37787