A box of milk 12 packets, the price is 42 yuan. Supermarket a launched a promotional campaign to buy a box of milk to send two packets of milk, supermarket B the same milk 15% discount, ask which is cheap

A box of milk 12 packets, the price is 42 yuan. Supermarket a launched a promotional campaign to buy a box of milk to send two packets of milk, supermarket B the same milk 15% discount, ask which is cheap

Of course, if you want two more bottles of milk, supermarket a is more cost-effective. Anyway, it's only a few cents short

For a shampoo, the retail price is 38 yuan per bottle. A mall will carry out the promotion activities of "buy four get one free" (buy four get one free) and B mall will carry out the promotion activities of "20% discount". If you buy 10 bottles, compare the two promotion methods. Which mall do you think is more suitable to buy? And give a brief explanation

Market price
=38×8
=304 yuan
B market price
=38×10×0.8
=304 yuan
So: A and B are the same, because the price is the same

The retail price of a shampoo is 38 yuan per bottle. A department store will carry out the promotion activities of "buy four get one free" (buy four get one free), and B department store will carry out the promotion activities of "20% discount"
Compare these two promotion methods. Which shopping mall do you think is more suitable?

B's good. It's OK to buy one. It's too much to buy five at a time. It's not good

A primary school decided to give each of 102 teachers a bottle of shampoo. The price of each bottle is 24 yuan. Now we buy 2 for free in the promotion. How much does the school spend on this activity

Assuming that the actual purchase of X bottles, then should send X / 2 bottles
X+X/2=102
Solution x = 68
So the total price is 68 bottles x 24 yuan / bottle = 1632 yuan
A: the school will spend 1632 yuan on this activity
It's too much trouble. I'm sorry if I don't give it to you!