7) Dollar Store A store sells all items for $1. Customers buying 10 or more items receive a 5% discount. Additionally, there is 7.5% sales tax. Write a program that prompts the user for the number of items purchased, and calculates the total cost before and after tax. Here is an example session: Enter number of items: 10 Net Cost: 9.50 Tax: 0.71 After tax: 10:21 As part of your program, define and use these functions: calcCost(count) Calculate the pre-tax cost Pretax total cost of ' items purchased, accounting for discount if any Count: an integer for the number of items purchased Label: the label for the displayed line Amount: the amount for the displayed line None (function displays to screen) Display one %ine of the output, formatted to a given width and number of decimal places displayLine(label, amount) Display net cost, tax, and after-tax amounts using calls to displayLine() function Cost: the pre-tax cost, calculated by calcCost() Tax: the tax None (function displays to screen) display(cost, tax) * Technically, the function returns the special Pvthon value None