write a java program that will calculate the sale based on the price per unit and the number of units entered by the user. A discount rate is 5% for the quantity purchased between 100 and 150 units, and 10% for the quantity purchased greater than 150 units. If the quantity purchased is less than 100 units, the discount rate is 0%. Before the program terminate display the revenue from the sale, discount and the price after the discount. Sample output: Enter unit price: 20 Enter unit price: 10 Enter quantity: 110 Enter quantity: 50 The revenue from sale: 2200 Cost of sale: 50 Discount: 220 Discount: 0 After discount: 1980 (2200-220) After discount: 50

I do get this logic but it would be helpful if you could define this in code flow.i.e., what goes where. I'm entirely new to opengl java programming.

In a Java application, we know that we must have a Main method to run the program.  What tells the Main method to run and what would happen if you did not include the Main method in your Java application?