A company manufactures pens. It makes a profit of INR 18.00 when it sells 100 pens to a local shop. The local shop, in turn, makes a profit of INR 4 on selling 50 pens at 80 paise per pen. How much did it cost the company to manufacture 100 pens? 1. INR 64 2. INR 55 3. INR 54 4. INR 32.50 5. INR 56