Musa ships cars into Ghana, Nigeria and Benij republic from the United States of America. The import duty costs are 10%, 25% and 12% respectively for used cars from the three countries and 25%, 40% and 20% for new cars. He has landed a used Benz C300 and a new Toyota Highlander for $12,000 and $30,000 respectively. For how much should he markup the cars, if he desires to make a minimum profit of 15% after giving a discount of 10% to a reseller in Abuja, Nigeria?