One night, three people went to a hotel and stayed in 300 yuan for one night. Three people just each paid 100 to make up 300 yuan for the boss. Later, the boss said that he would hold an activity today and give a discount to 250 yuan. He took out 50 yuan's money and told the waiter to return it to the three of them. The waiter secretly hid 20 yuan and gave the remaining 30 yuan money to the three of them, each 10 yuan. So everyone just paid 100 yuan, and now they have paid 10 yuan, which is 90 yuan. Everyone only spent 90 yuan's money, and each of the three people, 90 yuan is 270 yuan, and 20 yuan hidden by the waiter is 290 yuan. 1where did 0 yuan go?

"Everyone only spent 90 yuan's money, 90 yuan of three people, 270 yuan of 3×90=270 (yuan) and 20 yuan hidden by the waiter are 290 yuan.

270+20=290 (yuan) "This is not right! It should be that everyone only spent 90 yuan, and three people spent 270 yuan. The 20 yuan hidden by the waiter is included in the 270 yuan, so it should not be increased by 20, but decreased by 20. So 270-20 = 250 yuan was accepted by the boss, 20 yuan was accepted by the waiter, and 30 yuan was accepted by the guests, totaling ***250+20+30=300.