I created an acct just to reply to this.
Thank you so much for posting the PDF. I took the screenshot to best buy and showed a rude lady and she said no. She said it had to be online that day on costcos website (I'm not even a member) lol. However I didn't accept no lol.
I simply emailed the store manager and sent him the screenshot. He emailed me back and said no problem come to the store today. I did. Just got $170.xx back on a best buy gift card. Great customer experience. Yayyy! Thank you thank you member who posted the PDF!