Answer: First option is correct.
Step-by-step explanation:
Since we have given that
$12.60 for 7 bottles of juice.
then, cost of each bottle of juice would be
$10.98 for 6 bottles of juice.
then, cost of each bottle of juice would be
$18.10 for 10 bottles of juice.
then, cost of each bottle of juice would be
$16.38 for 9 bottles of juice.
then, cost of each bottle of juice would be
Hence, $12.60 for 7 bottles of juice is the best buy as it is the cheapest one.
Therefore, First option is correct.