Denon AVR-X3500H 7.2-Ch A/V Receiver $529.00 – 20% (In-Store) $423

I went to the store in Anaheim, Ca and the listed price for the X3500H is $799. I Printed out the webpage of the "trusted brand receiver" and gave it to a sales associate to create a quote for $529.00. Now go find the manager to give you the 20% off coupon. When I went to check out, they couldn’t apply the 20% coupon because the receiver had already been discounted. They told me to go to customer service so they could refund me 20%. I ended up paying $570.00 – $114.22 = $455.78 (Tax included 7.75%)
The store in Anaheim had about 3-4 receivers left. I can provide receipts if needed.
http://images.frys.com/art/email/031719_sun645cet_special/1_sun_specialeweb.html?clickid=wPTXAkTzySiT2YfSJMVIW2kvUklxmJV3XU3tSc0?
https://www.frys.com/product/9773…IN_RSLT_PG
Receipt: https://imgur.com/0TMzv7m
Refund receipt: https://imgur.com/10VJvM2