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.

['4161', 'E']
4161

['h', '9539', '3373']
12912

['C', '7689', 'I', '1295', '9493', '4773', 'l', '3617', '4137', 'O', 'b', 'Z', '5611', '4477', '9955', '479', '5071']
56597