"Cuánto falta?" means "how much longer".
Can't it also mean "how much do I owe you?"
For example, if you're paying for something with cash and you gave them some bills but still owe them a few coins to reach the total..? (how many coins are still needed?)
Thank you!
Hola B. L
Yes, in a way, you can also interpret it that way, so it's like saying:
How much is it missing (to get to what I need to pay to you)?
so you can say that in that sort of situation.
Saludos
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