Bob buys nose spray.  He buys 10 of them for a "buy one get one free" promotion.  They each cost $3.  How much does he pay? Let's think step by step and output the final answer after "####".
user
He got 10/2=<<10/2=5>>5 paid
That means he paid 5*3=$<<5*3=15>>15
#### 15
Bob buys nose spray.  He buys 10 of them for a "buy one get one free" promotion.  They each cost $3.  How much does he pay?
train