May Clothing is a retail men’s clothing store. May’s variable cost is $20 per shirt and the sales price is $40 per shirt. May plans to sell 400,000 shirts for the year and, at this level, would...

May Clothing is a retail men’s clothing store. May’s variable cost is $20 per shirt and the sales price is $40 per shirt. May plans to sell 400,000 shirts for the year and, at this level, would generate a beforetax profit of $2,500,000. What is the degree of operating leverage (DOL) at this volume level?