Could you please answer this question in details and clear writing? Thanks

cost s of 1. Suppose that Bethlehem Steel has a current sales level of $2.5 billion, variable $2 billion, and fixed costs of $400 million. If sales rise by 15%, how much will pre-ta increase in dollar terms? What will be the percentage increase in pre-tax profit? What explains the relationship between the percentage change in sales and the percentage chang in pre-tax profit for Bethlehem? x profit