Discounts apply:

3 - 5 days: 10% discount
6 - 8 days: 15% discount
9 - 11 days: 20% discount
12 - 14 days: 25% discount
15 - 17 days: 30% discount
18 - 20 days: 35% discount
21 - 23 days: 40% discount
24 - 26 days: 45% discount
27 or more days: 50% discount