A customer in a store is purchasing n items. Write an application that asks for the price of each item, then displays the subtotal of the sale, the amount of sales tax, and the total. Assume the sales tax is $7$ percent $($to be set up using a named constant$).$

Your application is to consist of multiple methods, including the following:

A value$-$returning method to return a valid value for n

Have the user enter a value for n$,$ a positive integer. As long as the entered value is less than $1,$ then have the user try again. Once a valid value for n is entered, return it to the calling method

A value$-$returning method to compute the subtotal of the sale

Set up a loop to compute the subtotal of the sale $,$ using the value of n that is received through a parameter

Return the subtotal of the sale value to the calling method

A value$-$returning method to compute the amount of sales tax

The method is to receive the subtotal of the sale value through a parameter

Return the computed sales tax value to the calling method

A value$-$returning method to compute the total amount for the transaction

The method is to receive the subtotal of the sale value and the sales tax value through parameters

Return the computed total amount value to the calling method

A main$()$ method, where the above methods are called