Show that the check digit of an RTN can detect all single errors and determine which transposition errors an RTN check digit can catch and which ones it cannot catch.

Chapter 5—Cost VolumeProfit Relationships Primary purpose – to estimate how profits are affected by the following five factors: 1. Selling prices 2. Sales volume 3. Unit variable costs 4. Total fixed costs 5. Mix of products sold. However, to simplify calculations, three assumptions are held: 1. Selling price is constant. The price of a product or service will not change as volume changes. 2. Costs are linear and can be accurately divided into variable and fixed elements. The variable element is constant per unit. The fixed element is constant in total over the entire relevant range. 3. In multiproduct companies, the mix of products sold remains constant. Contribution margin – the amount remaining from sales revenue after variable exp