Create a class named Item that has a double data member cost. The class also has a static int data member number. This static data member records how many Item objects were created. It should be initialized to $0.$ Whenever a new object is created, number should be incremented by $1.$ Your class should provide the following:

$($a$)$ A constructor $($cost defaults to $1\mathrm{.}0).$ Note: the cost should be at least $1\mathrm{.}0.$

$($b$)$ A destructor that decrements number by $1$ and prints $"$An Item has been destroyed".

$($c$)$ A set and a get function for the data member cost.

$($d$)$ A static member function getNumber that returns the value of number.

$($e$)$ A toString member function that returns the string representation of an $/$tem object. e$.$g$.,$ Assume that there is an Item object with the data member cost $12\mathrm{.}34,$ x$.$toString$()$ should return $"$$$12\mathrm{.}34".$

Write a main function to test the class.