Chapter 5 4. Thanks Inc. manufactures and sells its product i-Robut. The price/unit is $50 and variable cost/unit is $20. At the breakeven point, 200 units are sold. Required: a. What is the contribution margin per unit? b. What is the contribution margin ratio? c. What is the total revenue required to achieve a net income of $30,000? d. Currently, the company sells 500 units. What will be the impact on the income if the company increases the direct material/unit by $5, increases marketing cost by $20,000, and increases the sale to 600 units