Contribution Margin Ratio, Variable Cost Ratio, Break-Even Sales Revenue

The controller of Ashton Company prepared the following projected income statement:

Sales	$88,000
Total Variable cost	69,520
Contribution margin	$18,480
Total Fixed cost	9,240
Operating income	$9,240

Required:

1. Calculate the contribution margin ratio. %

2. Calculate the variable cost ratio. %

3. Calculate the break-even sales revenue for Ashton. $

4. How could Ashton increase projected operating income without increasing the total sales revenue?