Answer:
$17.1
Explanation:
If Gianna paid $4.75, then she had $4.75 more than she has now. So, before she bought the smoothie, she had $12.35 + $4.75.
We can break this up into $12.00+$0.30+$0.05+$4.00+$0.70+$0.05.
Now, we have $16.00+$1.00+$0.10=$17.10, which is just $17.1