The cost of the drink was $3.58.
First, you find the cost of the salads, which is 11.70 divided by 3.
The answer is $3.90. Then, you multiply that by two for both salads.
Your answer is $7.80. Then, add the pizza to it. That's $19.50.
Don't forget they had a coupon! Now, you want to find the original price.
Add $2.00 to $21.08, you get $23.08.
Now, subtract $23.08 by $19.50
Your answer is $3.58.
Hope this helps!!