Look at the graphic. How much of a discount will the woman receive?

W: Excuse me. I’m trying to find the kitchen appliances. They’re usually displayed near the main entrance, but all I see are sofas and tables.
M: The manager here at Markley recently swapped the locations of the furniture and appliances departments. You should head up to the second floor.
W: Oh, thanks for your help. I’m planning to use this coupon to buy the ProWash 500 Dishwasher that I saw in your catalog. I think it costs 550 dollars.
M: That’s a popular model, but it only costs 400 dollars now. The price has come down by 100 dollars since the product was first launched.