1. Solution: Because there are 4 bottles, one bottle is sent to 3 yuan, so

5 bottles = 12 yuan

45/5=9 (four bottles get one bottle, and one * * * gets nine bottles)

So * * * needs to spend 12*9= 108 yuan.

Answer: * * * Cost 108 yuan.

2.45/(4+ 1)=9

3*4= 12

12*9= 108

Answer: * * * Cost 108 yuan.