There are a ton of bright shiny lights on the way to building a startup, and it's tempting to burn through cash for the sake of rapid growth. So after getting a big capital injection, for example, it's normal for founders to get excited. But how long can you keep this up before it becomes unsustainable?When you're playing the long term game, unit economics is something any operator should pay attention to. It not only helps you set priorities, but also build a path to profitability.Having met hundreds of founders in the past decade she's worked in VC, Mariana Donangelo has seen healthy unit economics as a common thread among successful businesses. She also experienced the power of this tool first hand at Invoice2go, where she lead growth for 4 years and made sure to understand and have better control of the levers that eventually made the company lucrative.Before Invoice2go, Mariana was an investor at Accel, helping close several deals in Latam. In 2020, she became a partner at Kaszek. Today, she talks to us about:The metrics you should look at to understand unit economicsHow they impact investment decisionsHer own initiatives at Invoice2Go to make it more sustainableAnd her views on how the VC ecosystem changed in the past 10 yearsSet up an international corporate structure accepted by international investors with Latitud Go.