Better deal than the B&M deal posted earlier this month:
15amp 2pk 50ft extension cable from Costco via Google Express
$35.54 – 20% using code SHOPCOSTCO25 = $28.85, qualifies for free shipping.
Note, you must enter your Costco Membership Information (Name & Card Number) in order to purchase from Costco on Google Express.
https://express.google.