TASK：第一遍先泛听，第二遍看文本了解自己有哪些没听到，没听懂没听到的地方反复听，也可以听写。

 This is a coupon for Burger King's Crossian'wich, and it's promoting a buy-one-get-one-free deal -- buy one breakfast sandwich at full price, get a second for no extra cost. But one customer found that something was off about the deal when she was charged two different prices for the sandwich. When she ordered a single sandwich, the price was two dollars and sixteen cents, but when she ordered two sandwiches and use the BOGO coupon, the price of each sandwich was three dollars and nineteen cents, more than a dollar more.

This went on for years before Burger King was sued for overcharging customers. BOGO is so appealing that it's hard for consumers to see it for what it is. 

BOGO is a thinly veiled attempt to convince a customer to buy more than one item at a time. 

For a thrifty shopper, BOGO can sound like the best way to get more bang for their buck（买得实惠）, but often it's simply not as good a deal as it appears. 

Consumers perceive the quality of a bargain based on the price they pay compared to the original list price. Take this food processor on Amazon for example. The price on sale is 35 dollars, an amazing 52 percent off the 75 dollar list price. The problem is that Cuisinart doesn't list the item for amazons regular price. Based on an analysis of track prices over time. Amazon has never sold it for more than 40 dollars in the past 10 years. 

The cheating that goes on is rampant. Retailers are guilty often of distorting the regular price, raising the regular price.

Several companies have been caught distorting prices in conjunction with BOGO offers. The suit accused Visionworks up inflating the price of the first pair of glasses to partly cover the cost of the second supposedly free pair, making it not actually free. It can be hard for consumers to tell whether BOGO is fair or deceptive, and often their judgment is clouded by one four-letter word, free. 

I mean, free is a tremendous motivational trigger, and they like the opportunity to expand the deal by buying more than one of an item. Very often, consumers don't do the maths.

Buying more than one item means consumers spend more money than they intended. Not less. For example, say you want to buy a sweater that's normally 80 dollars. Sweater A is listed at a 20 percent discount sweater B is listed at full price but has a buy-one-get-one-free deal. While the second option may get you 2 sweaters, you've just spent more in total than if you just focused on the 20 percent discount. 

Let's say those sweaters are on a BOGO 50-percent-off deal. Option one, you buy one sweater for 80 dollars. Option two, the first water would be 80 dollars and the second would be half off. Translated into a straight discount, the total saved from the BOGO deal would be the same as a 25-percent-off deal. But the amount of money you spend in store has grown because you bought two items. 

Some BOGO deals only apply to items with lesser value. For example, if you buy that same sweater and a 10 dollar pair of socks, you still pay 80 dollars for your total purchase. If you decide to get a sweater and a 150-dollar coat, the sweater would be counted as the free item and you'd still be shelling out 150 dollars.

For most deal, you're better off waiting for the one item you wanted to go on sale rather than purchasing it through a BOGO deal.

Customers I won't say fall for it, but they go for it, nonetheless.

BOGO disguises the fact that unless you're already intended to buy two items, it really isn't all that big of a discount. So BOGO deals can be fantastic if you're a shopper looking to buy in bulk and stretch your dollar（类同get more bang for your buck）. But for most of us, free isn't always the best option. 

Oh, just do the math. If it looks too good to be true, it's too good to be true.