"Online Shopping Management System" project using At least three classes are required $(1$ super class and $2$ sub classes$)$

$[$Classes should be identical for everyone and repetition of same classes will lead you to zero marks,

also you can$$t choose any class which is already shown in the class$]$

$$ Create two different packages and use at least one of those

$$ In your class design you must have to have the reflection of the concept of Encapsulation, Method

overloading, Method overriding, and Abstraction.

$[$In method overriding there should have some mathematical calculation not just a random print

statement$]$

$$ Exception must be handled for any abnormal$/$exceptional cases. At least $1$ custom exception must

be there.