i need help coding this in java:

Instrcuctions:

Cell Solutions, a cell phone provider, sells the following data plans:

$8$ gigabytes per month: $$45\mathrm{.}00$ per month

$16$ gigabytes per month: $$65\mathrm{.}00$ per month

$20$ gigabytes per month: $$99\mathrm{.}00$ per month

The provider sells the following phones. $($A $6$ percent sales tax applies to the sale of a phone.$)$

Model $100$: $$299\mathrm{.}95$

Model $110$: $$399\mathrm{.}95$

Model $200$: $$499\mathrm{.}95$

Customers may also select the following options:

Phone Replacement Insurance: $$5\mathrm{.}00$ per month

WiFi Hotspot Capability: $$10\mathrm{.}00$ per month

Write an application that displays a menu system. The menu system should allow the user to select one data plan, one phone, and any of the options desired. As the user selects items from the menu, the application should show the prices of the items selected.

this is in main.java