diff --git a/workshop_management.java b/workshop_management.java
new file mode 100644
index 0000000..3f7af08
--- /dev/null
+++ b/workshop_management.java
@@ -0,0 +1,102 @@
+class Item
+{
+	int id;
+	String name;
+	int price;
+	int qty;
+	Item() //blank default constructor
+	{}
+	Item(int id, String name, int price, int qty)
+	{
+		this.id = id;
+		this.name = name;
+		this.price = price;
+		this.qty = qty;
+	}
+	void out(Item I[])
+	{
+		for(int i=0;i<I.length;i++)
+		{
+			System.out.println(I[i].id + " " + I[i].name + " " + I[i].price + " " + I[i].qty);
+	
+
+		}
+	}
+}
+class Sales extends Item
+{
+	int id;
+	int qty;
+	Sales() {}
+	Sales(int id, int qty, Item I[])
+	{
+		this.id=id;
+		this.qty=qty;
+		for(int i=0;i<I.length;i++)
+		{
+			if(id==I[i].id)
+			{	
+				I[i].qty=I[i].qty-qty;
+				break;
+			}
+		}
+	}
+}
+class Purchase extends Item
+{
+	int id;
+	int qty;
+	Purchase() {}
+	Purchase(int id, int qty, Item I[])
+	{
+		this.id=id;
+		this.qty=qty;
+		for(int i=0; i<I.length; i++)
+		{
+			if(id==I[i].id)
+			{
+				I[i].qty = I[i].qty+qty;
+				break;
+			}
+		}
+	}
+}
+class Account extends Sales
+{
+	int sum=0;
+	Account() {}
+	Account(Sales S[], Item I[])
+	{
+		for(int i=0;i<S.length;i++)
+		{
+			for(int j=0;j<I.length;j++)
+			{
+				if(S[i].id == I[j].id)
+				{
+					sum = sum + ((S[i].qty)*(I[j].price));
+				}
+			}
+		}
+		System.out.println("You have to pay Rs "+sum);
+	}
+}
+class Inheritance
+{
+	public static void main(String args[])
+	{
+		Item i[] = new Item[5];
+		i[0] = new Item(1, "bike",50000,3);
+		i[1] = new Item(2, "car",80000,5);
+		i[2] = new Item(3, "cycle",5000,10);
+		i[3] = new Item(4, "activa",60000,5);
+		i[4] = new Item(5, "toycar",1000,50);
+		//i[0].out(i);
+		Sales s[] = new Sales[3];
+		s[0] = new Sales(1,2,i);
+		s[1] = new Sales(2,1,i);
+		s[2] = new Sales(5,10,i);
+		//i[0].out(i);
+		new Account(s,i);
+	}
+	
+}