The question says, "KwikFix repairs smartphones. KwikFix charges $60 for a basic screen repair. At this price, elasticity of demand for this service is estimated at 2.3. What is the...?" You KNOW that the tool to use for this problem is NOT percent profit breakeven. How do you know that for certain? The questions mentions elasticity of demand. I think I COULD use percent profit breakeven, so this is a trick question. Percent profit breakeven is only for problems involving goods, not services. The question does not provide information on costs or margins for KwikFix