Answer:
$2.50
Explanation:
the second price is when you add one more drink. Ti find the price of a drink you subtract $4 from $5.50
5.50 - 4 = 1.50
So a drinks cost $1.50. The price of ONE drink and a box of chocolates is $4. So subtract the drink price ($1.50) from $4
4 - 1.50 = 2.50
The cost of a box of chocolates is $2.50