Task: Question Answering
Input (English): Context: Anyway , initially he said he can give us a $ 50 cash return if we trade in our own vacuum cleaner . When I asked if that 's the lowest price he could give us , initially he said yes and when I asked again later , he said if we took the demo model , he could give us $ 100 off . He added that he could n't be bothered to pack and unpack the machines so he said he would just write " demo " in the receipt but in actual fact , we would have a brand new one . 
Question: Why is the person offering a $ 100 discount ?
Output (English): He 's trying to give the buyers incentive so that a sale can be made .