Gross margin along with ebitda are great ways to do quick views on a company from an investor standpoint. You don’t care about tax, interest depreciation because those things can easily change, you care about the core business. Gross margins are high but ebitda margins are low? Then you know where to look in the finances to ask the first question of what is happening in the middle. If gross margins are low, probably a non starter unless it’s a non commodity product where you can raise price.