tax values for retail items. This class should have:

$$ Two immutable fields for tax rate and an array of prices for enumerated retail

items. $(1$ point$)$

$$ A constructor that takes the tax rate and the price array and initializes the above

fields with their values. Remember to copy array elements from the parameter

array so you don$$t create a security vulnerability. $(2$ points$)$

$$ A public method that takes a retail item and returns its price. To find the correct

price use the ordinal value of the retail item. $(1$ point$)$

$$ A public method that takes a retail item and uses a switch statement to

compute the tax. For taxable items the value is the price for the item times the

tax rate, and for non$-$taxable the tax is $0.$ Assume that soap and soda are

taxable, but chips and cereal are not. $(2$ points$)$

$$ A class CashRegister to simulate the cash register. This class should have:

$$ A field for the retail item lookup reference. All instances of the

CashRegister class should use the same instance of RetailItemLookup

$(1$ point$)$

$$ An ArrayList to hold all purchased items for each customer transaction.

Each instance of the CashRegister should have its own instance of the

purchased items ArrayList. $(1$ point$)$

$$ A public setter for the retail item lookup. $(1$ point$)$

$$ A public method startTransaction that creates a new instance of the

purchased items ArrayList. $(1$ point$)$

$$ A public method scanItem that takes a retail item and adds it to the

purchased items ArrayList. $(1$ point$)$

$$ A private method to calculate the subtotal for the transaction. It should use the

enhanced for loop to iterate over the purchased items ArrayList, look up

the item price and add it to the rolling subtotal for each iteration. $(2$ points$)$

$$ A private method to calculate the tax. It should also use the enhanced for loop

to iterate over the purchased items, look up the tax value for the item, and add

it to the rolling total tax. $(2$ points$)$

$$ A public method to print a formatted receipt. It should print each purchased

item and its price $($remember the implicit toString$()$method for enums$),$

the subtotal, the tax and the total. $(3$ points$)$

$$ A CashRegisterDemo class with the main$()$ method. The main$()$ method

should:

$$ Create an array of double for the item prices. Each price$$s index should be the

ordinal value of the corresponding retail item. $(1$ point$)$

$$ Instantiate a RetailItemLookup object initialized with the tax rate value

and the item price array. $(\mathrm{.}5$ points$)$

$$ Use the static setter to set the retailItemLookup field of the

CashRegister class. $(\mathrm{.}5$ points$)$

$$ Instantiate a CashRegister object and test it with three separate

transactions: all groceries, all non$-$groceries, and some of each. $(3$ points$)$

Your output should look similar to this:

CHIPS $ $2\mathrm{.}49$

CEREAL $ $3\mathrm{.}25$

Subtotal $ $5\mathrm{.}74$

Tax $ $0\mathrm{.}00$

Total $ $5\mathrm{.}74$

$----------------$

SOAP $ $1\mathrm{.}79$

SODA $ $2\mathrm{.}99$

Subtotal $ $4\mathrm{.}78$

Tax $ $0\mathrm{.}39$

Total $ $5\mathrm{.}17$

$----------------$

CHIPS $ $2\mathrm{.}49$

CEREAL $ $3\mathrm{.}25$

SOAP $ $1\mathrm{.}79$

SODA $ $2\mathrm{.}99$

Subtotal $$10\mathrm{.}52$

Tax $ $0\mathrm{.}39$

Total $$10\mathrm{.}91$

$----------------$

Notes:

$$ Your classes and methods should have javadocs. Uncommented code is an

automatic $1-$point deduction.

Please help asap!!!