A brand new beverage bottle (1200ml) 10 yuan, and a small bottle (200ml) in 2 yuan. In order to promote this drink, the three stores have introduced preferential policies respectively. Shop A buys a large bottle 1 gives a small bottle 1, shop B gets a 10% discount, and shop C gets a 20% discount when shopping over 30 yuan.

(1) Question 1: Which store is cheaper to buy 1 small bottles of drinks?

Analysis: To buy 1 small bottle of beverage, store A wants 2 yuan, store B wants 2×0.9= 1.8 (RMB), and store C wants 2 yuan. So it's more cost-effective to go to shop B. A: It's more cost-effective to go to shop B.

(2) Question 2: Which store is cost-effective to buy 1 large bottles and 1 small bottles? Analysis: Store A spends 10 yuan, Store B spends 12×0.9 = 10.8 yuan, and Store C spends 12 yuan, so it is more economical to go to Store A. Answer: It is more cost-effective to go to Store A. ..

(3) Question 3: Naughty wants to buy three large bottles of drinks and three small bottles of drinks. Which store will he go to? Analysis: If you buy three big bottles of drinks in Shop A, you get three small bottles of drinks, that is, 30 yuan; If you buy three large bottles and three small bottles of drinks in store B, you get three small bottles of drinks, 36×0.9=32.4 yuan; If you buy three large bottles and three small bottles of drinks in store C, it will cost 36×0.8=28.8 yuan, so it is cheaper to go to store C. Answer: Naughty people will go to store C.

(4) Question 4: When the class holds a get-together, it is necessary to prepare about 200 ml of drinks for each student. If there are 35 students attending the party, which store is more cost-effective?

Analysis: According to the analysis in question 3, the class bought more drinks than 30 yuan, so it is more cost-effective to go to store C. Answer: It is more cost-effective to go to store C.