Java, symbol error not found?

I tried to calculate the total price of unit price 17 and the quantity of goods 20

public class hw1_task3 {
    public static void main(String[] args) {
        int total = units * price;
        int units = 20;
        int price =  17;
        System.out.printf("The total is: %d",total);
    }    
}

What's wrong with the plan? I've been getting an error about not being able to find symbols I am a novice in Java. Thank you very much for any help

Solution

You need to move units and prices above the total as follows:

int price =  17;
int units = 20;
int total = units * price;