17. Tesla Motors currently sells one product, an electric car known as the C200. Current annual sales are 40,000 and each car has a contribution margin of $10,000. Current fixed costs are $100,000,000. Tesla is considering offering an add-on package (which allows the car to fly) for an additional fee of $50.000. A team of five engineers - each with a fixed annual salary of $1,000,000 - will be hired to build and manage the add-on package. Additionally, direct material costs for each add-on package will be $30,000. Due to the publicity of offering the add-on package, sales of the C200 are also expected to increase by 20%. Taking into account the projected increase in sales units, how many add-on packages must be sold in order to increase profit by 50%