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.

['433', 'y', '2015', '5997', 'X', 'u', '9321', '8037', 'N', 'Z', 'E', '4645', '627', '6595', '7679']
45349

['r', 'z', 'u', 'D', '3449', 'E', 'f', 'w', '1627', '4093', '955', 'i', 's', 'R', 'b', '9773', '2169', 'M', '9305', '4775']
36146

['1487', 'q', 'P', '2785', 'Q', 'J', 'h', '7003', '3773', '9675']

24723