Definition: You are given a conversation between two people. 'Person1:' and 'Person2:' are used to separate their respective dialogues. If the conversation begins with a question, label it '1' otherwise '0'.
Input:  Person1:     How much do you pay wholesale for your products ?  
 Person2:  We have a few different wholesale vendors , so our cost varies a bit over the fiscal year . But the difference is miniscule , a fluctuation of about 0.2 % .  
 Person1:      That must impact your bottom line at least a little bit , doesn't it ? After all , your sticker price is pretty much set in stone . How much do they go for retail ?  
 Person2:  Retail price is 29.95 per unit . We take into consideration changes in supply cost when figuring this price .  
 Person1:      Is that including tax ?  
 Person2:  No , that's the price before tax . The tax rate is varies from different marketing areas , so it is difficult for us to figure in .  
 Person1:      How much is your profit margin then ?  
 Person2:  Our profit margin is in the neighborhood of 20 % . 

1