A software company sells a package that retails for $99. Quantity discounts are given based on the table below. Write a program that prompts the user for the number of units sold and calculates the total cost of the purchase. Store the retail cost in the named constant UNIT_PRICE and use the constant in all calculations.

Input Validation: Make sure the number of units is greater than 0.

Quantity Discount

10 - 19 20% 20 - 49 30% 50 - 99 40% 100 or more 50%

The language is c++

And this is how the output should look like

Secure l https://moodle.cpccedu/mod/assign/view.php?id oodleCAUsersiobedDownloads\spc4-12 (4).exe How many units were sold? 23 Your cost per unit is $69.30 The total cost of the purchase is $1593.90 2017 rogran Press any key to continue