1. Compute the profit (or loss) per account for (a) the retail customer line and (b) the business customer line, under both the (i) original cost system and (ii) the new activity-based costing (ABC) system. 2. What are the signs that Detroit's original cost system is "broken," such that it needs refinement or improvement? 3. Recall Detroit National Bank's incentive plan that relies on bonuses to boost customer numbers. What are your thoughts on this strategy, is it advisable? What adjustments might you consider as a result of your ABC analysis? 4. Activity based management involves managers utilizing ABC data for business decision-making. How could Detroit's managers leverage ABC data to formulate more lucrative marketing strategies? In what ways can they employ ABC information to pinpoint opportunities for cost reduction while maintaining customer satisfaction? 5. Explain to Rachel, why she needs to understand the costing system in place, and why the benefits of ABC are going to outweigh the costs of implementing ABC at Detroit National Bank