Respuesta :
If you do it C * 80% then C * 80% again for the price, it's $115.20
If you do it C * (1 - 20% - 20%) then it's $108, but i'm pretty sure it's the first one.
If you do it C * (1 - 20% - 20%) then it's $108, but i'm pretty sure it's the first one.