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    <p>Here is how I would answer it. Like @IswantoSan said, <code>NumberFormat.format()</code> does not compile so I changed that. Also, I got rid of all of the re-initialization that occurs every time you go through the loop. It is unneeded. Doesn't take up that much more memory but I was always told it is good practice. Also, the first letter in variable names should be lower case. Again, I was always told that is good practice. I could be wrong.</p> <p>I hope this is what you were looking for.</p> <pre><code>final static double espressoPrice = 2.00; final static double cappuccinoPrice = 3.25; final static double lattePrice = 3.50; final static double coffeePrice = 1.50; public static void main(String[] args) { int customersSimulated = 0; int maxCustomersSimulated = 4; int randomQuantity = 0; double total = 0; double totalCoffee = 0; double totalCappuccino = 0; double totalLatte = 0; double totalEspresso = 0; DecimalFormat df = new DecimalFormat("##.##"); while (customersSimulated &lt;= maxCustomersSimulated) { System.out.println("Customer " + customersSimulated); Random randomList = new Random(); int randomItem = randomList.nextInt(4) + 1; if (randomItem == 1) { System.out.println("Item purchased: Coffee"); randomQuantity = randomList.nextInt(5) + 1; System.out.println("Quantity purchased: " + randomQuantity); double totalCoffeeCost = randomQuantity * coffeePrice; System.out.println("Total Cost: $" + df.format(totalCoffeeCost)); totalCoffee+=totalCoffeeCost; } else if (randomItem == 2) { System.out.println("Item purchased: Latte"); randomQuantity = randomList.nextInt(5) + 1; System.out.println("Quantity purchased: " + randomQuantity); double totalLatteCost = randomQuantity * lattePrice; System.out.println("Total Cost: $" + df.format(totalLatteCost)); totalLatte+=totalLatteCost; } else if (randomItem == 3) { System.out.println("Item purchased: Cappuccino"); randomQuantity = randomList.nextInt(5) + 1; System.out.println("Quantity purchased: " + randomQuantity); double totalCappuccinoCost = randomQuantity * cappuccinoPrice; System.out.println("Total Cost: $" + df.format(totalCappuccinoCost)); totalCappuccino+=totalCappuccinoCost; } else if (randomItem == 4) { System.out.println("Item purchased: Espresso"); randomQuantity = randomList.nextInt(5) + 1; System.out.println("Quantity purchased: " + randomQuantity); double totalEspressoCost = randomQuantity * espressoPrice; System.out.println("Total Cost: $" + df.format(totalEspressoCost)); totalEspresso+=totalEspressoCost; } System.out.println(); System.out.println("Total Coffee Cost: $" + totalCoffee); System.out.println("Total Cappuccino Cost: $" + totalCappuccino); System.out.println("Total Llatte Cost: $" + totalLatte); System.out.println("Total Espresso Cost: $" + totalEspresso); System.out.println(); customersSimulated++; } } </code></pre> <p>Basically, when you initialize and define a variable outside that while loop, <code>+=</code> it within the loop, it can be accessed outside the loop and will be "remembered" throughout the code being ran; if that makes sense to you.</p>
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    1. POHow do I get the total cost of sales of each item within a loop?
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    1. POHow do I get the total cost of sales of each item within a loop?
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    1. COI see. Thanks. This looks a lot easier than the accumulator I was trying to fit in.
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