Answer:
$1.25
Explanation:
Cost of 1 bottle of lemonade = $3.50
The grocery store is currently having a sale on lemonade which advertises 6 bottles for $13.50.
So, Sale price of 6 bottles = $13.50
So, Sale price of 1 bottle =

=

Now Difference between the normal price and sale price = $3.50-$2.25
=$1.25
Hence the lemonade on sale per bottle compared to the normal price per bottle is $1.25 cheaper .