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.

['a', 'f', '2185', 'N', '6381', '6429', '7499', 'd', '757', 'k', 'k', 'b', 'N', '2697', 'A', '8037']
33985

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

['z', '3213', 'p', '105', 'x', 'T', 'y', 'K']

3318