问题补充：However, if you buy the watch today, you will receive an additional 10% off of the sale price. What is the final sale price of the watch?

最佳回答：

原价 = 259.95

打折15%； 259.95 x 0.85 = 220.9575

再优惠10%； 220.9575 x 0.9 = 198.86175

手表最终售价 = 198.86175

其他回答：

网上有，找找