Comprehension Passage
Directions: Study the table and answer the given questions.
In the following table, daily sales data (in units sold) for three products (Bread, Cake, Cookies) over a four-day period is provided for a small bakery.
| Day | Bread (units) | Cake (units) | Cookies (units) |
|---|---|---|---|
| Monday | 75 | 45 | 30 |
| Tuesday | 60 | 50 | 25 |
| Wednesday | 65 | 40 | 35 |
| Thursday | 70 | 55 | 40 |
What is the difference between the highest and lowest sales of Cookies in a day?
1
10
2
5
3
15
4
20
5
None of these