Question

jay can buy a stereo either online or at a local store. if he buys online, he gets 15% discount, but has to pay a $12 shipping fee. at the local store, the stero is not on sale,but thereis no shipping fee. for what regular price is it cheaper for jay to buy the stereo online?

Answer 1

For it to be cheaper to buy online, the 15% discount has to be greater than the shipping fee of $12. If 15% is 12, 10% is 8, so 100% is $80. Therefore, any store price of over $80 makes it cheaper to buy online.