# I can't figure out how to add taxes

I can't figure out how to add the taxes to the berry banana price. Would I need to use math.pow or is there a specific way to add fraction results to an decimal number? Probably such a silly question but I can't figure out it, my teacher wants me to use constants for everything. Please let me know if there's multiple ways to do this.

``````public static void main(String[] args) {
// TODO Auto-generated method stub

final double BERRY_BANANA_PRICE = 7.50;
final double TROPICAL_PRICE = 6.75;
final double GREEN_JOLT_PRICE = 5.00;
final double TAX_RATE = 8.25 / 100;

Scanner input = new Scanner(System.in);

System.out.println("CS1150 Beach Smoothie Bar!");
System.out.println("");
System.out.println("Option   Type           Price");
System.out.println("------------------------------------");
System.out.printf("1        Berry Banana   \$%.2f\n", + BERRY_BANANA_PRICE);
System.out.printf("2        Tropical    \$%.2f\n", + TROPICAL_PRICE);
System.out.printf("3        Green Jolt  \$%.2f\n", + GREEN_JOLT_PRICE);

System.out.println("");

System.out.print("Select a smoothie: 1, 2, or 3:");
int selectasmoothie = input.nextInt();

System.out.println("");

if (selectasmoothie >= 1 && selectasmoothie <= 3) {

System.out.println("----------------------------------");
System.out.printf("1        Almond Butter       \$%.2f\n", + ADD_IN_PRICE);
System.out.printf("2        Lime juice       \$%.2f\n", + ADD_IN_PRICE);

System.out.println("");

System.out.println("");
System.out.println("------------------------------");
System.out.printf("Berry Banana Smoothie  \$%.2f\n", BERRY_BANANA_PRICE);
System.out.println("");
System.out.printf("Taxes                  \$%.2f\n", BERRY_BANANA_PRICE * TAX_RATE);
System.out.println("------------------------------");
System.out.printf("Total Cost             \$%.2f\n",BERRY_BANANA_PRICE +  );
} else {
System.out
.printf(selectanaddin + " " + "is not a valid menu item. Please run program again, good bye!");
}
}
}// main
``````

2. You have 3 kinds of smoothies (plus add-ins), save the value of the smoothie (plus add-ins) in a variable called `totalPrice`.
3. `System.out.printf("1 Berry Banana \$%.2f\n", + BERRY_BANANA_PRICE);` will not compile, you need a variable before the `+`. The same mistake is in several lines (probably just a copy and paste error).
4. To increase an amount by a percentage use `value * (1 + percentage)` (`-` if you want to decrease it, like making a discount).
5. It is not advisable to use floating points to represent money because it can introduce rounding errors, use `BigDecimal` instead.