Respuesta :

1. So (in between) 

2. Since (in the front) 

3. So (in between) 

4. But (in between) 

5. And (in between) 

6. So (in the front of the sentence)

7. After/before/when (it could be any of those in the middle 


Hope this helps ya
A the answer is selling cookies because as it states that the rate is 500 for three weeks and also because most people like having cookies than lemonade. Sorry but I don't know the answer for b