Answer:
$4.10
Step-by-step explanation:
To find the mode, you have to find the number that appears most. We can help make it easier to find the mode by putting the numbers in order.
$2.60, $4.10, $4.10, $4.10, $4.20, $4.20, $5.70
We can see that $4.10 appears the most, so the mode is $4.10.
