A. In 2022, Hsu Company had a BEPu of 4,000 units based on a selling price of $100 per unit and VC$/u of $70 per unit. What are the contribution margin ratio, contribution margin per unit, and total fixed cost? B. What are the total sales that must be generated for QQ to earn a profit of $6,000? C. If the QQ is presently selling 5,000 units but plans to spend an additional $10,800 on an advertising program, how many additional units must QQ sell to earn the same net income it is now making?