３段階の追加問題終わりました

em-oop/src/BasicCheck3.java

@@ -21,6 +21,9 @@ public class BasicCheck3 {
 		for (int i = 0; i < items.length; i++) {
 			items[i].sell(5);
 			System.out.println(items[i].name + " " + items[i].price + "円 残り" + items[i].stock + "個 ");
+			System.out.println("合計金額　" + items[i].totalPrice() + "円");
+			System.out.println();
+			
 		}
 
 	} 

em-oop/src/Item.java

@@ -7,4 +7,10 @@ public class Item {
 		this.stock = this.stock - amount;
 	}
 	
+	public int totalPrice() {
+		return price * stock;
+		
+	}
+
+
 }