Savannah wants to buy a new tablet that costs $140. She has a coupon expiring this week that is for 15% off any item. Next week, the tablet will be on sale for $125. When is it a better deal for Savannah to purchase the tablet, and why? A. It is better to buy this week because she will save $21 with the coupon.
B. It is better to buy next week because she will only save $8.40 with the 15% off coupon.
C. It is better to buy this week because she can get it sooner and the item will be $15 off both weeks.
D. It is better to buy next week because she will save $15 when the item goes on sale.