Here is a receipt for all items except the 3 way.
And just for what it’s worth, when I originally went in and saw the deal, there were 5 dimmers available all marked $10. I only bought one. After I realized I had a few lights they would work on, I went back to buy the others, but they had removed the $10 tag and we’re back at full price. I showed them the receipt with the item in question at $10 and they sold me the other 4 for $9 each.