Assume the following for Starbucks where the activity driver is sales of coffee cups:

1. If the number of coffee cups Starbucks sold increased, would the contribution margin ratio increase, decrease, or stay the same? 

2. If the variable cost per cup of coffee increased, would the breakeven point in sales increase, decrease, or stay the same? ? 

3. If the fixed costs for a particular Starbucks store decreased, would the contribution margin per unit increase, decrease, or stay the same