Abstract Item (abstract class) with interface and inheritance

import java.util.*;

//interface
interface IPrice {
    public double calcPriceWithVAT();
}

//abstract class
abstract class AbsItem implements IPrice {
    protected String itemId;
    protected String name;
    protected double unitPrice;
    protected int itemCount;

    public AbsItem(String itemId, String name, double unitPrice, int itemCount) {
        this.itemId = itemId;
        this.name = name;
        this.unitPrice = unitPrice;
        this.itemCount = itemCount;
    }

    public String toString() {
        return itemId + " " + name
            + " Unit Price:" + String.format(
            "%.2f",unitPrice)
            + " Item Count:" + itemCount;
    }

}

//FoodItem child class
class FoodItem extends AbsItem {
    private Date expiryDate;
    private String countryOfOrigin;

    public FoodItem(String itemId, String name, double  unitPrice, int itemCount, Date expiryDate,
    String countryOfOrigin) {
        super(itemId, name, unitPrice, itemCount);
        this.expiryDate = expiryDate;
        this.countryOfOrigin = countryOfOrigin;
    }

    public String toString() {
        return super.toString() + " Expiry date:" + expiryDate
            + " Country of origin: " + countryOfOrigin;
    }

    public double calcPriceWithVAT() {
        return (this.unitPrice * this.itemCount) +
            (this.unitPrice * this.itemCount * 0.05);
    }
}

class NonFoodItem extends AbsItem {
    private String itemCategory;

    public NonFoodItem(String itemId, String name, double   unitPrice, int itemCount, String category) {
        super(itemId, name, unitPrice, itemCount);
        this.itemCategory = category;
    }

    public String toString() {
        return super.toString() + " category:" +itemCategory;
    }

    public double calcPriceWithVAT() {
        return (this.unitPrice * this.itemCount) +
            (this.unitPrice * this.itemCount * 0.025);
    }
}

public class AbsItemTester {
    public static void main(String[] args) {
        //Create a list of items
        List<AbsItem> items = new ArrayList<>();

        AbsItem foodItem1 = new FoodItem("F101", "Alpin Water", 10, 10, new Date("22/12/2023"), "Turkiye");

        AbsItem nonFoodItem1 = new NonFoodItem("KB11", "Keyboard", 20, 10, "Computer Equipment");

        //add items to the list
        items.add(foodItem1);
        items.add(nonFoodItem1);

        //iterate over the list using for-each loop
        //and print item, its subtotal
        double total = 0;
        for (AbsItem item : items) {
            System.out.println(item
            + "\n\tSubtotal:"
                + String.format("%.2f",item.calcPriceWithVAT()));
            total += item.calcPriceWithVAT();
        }

        //print total of all items in the list
        System.out.println("\nTotal price:" +total);
    }
}