An online furniture store sells sofas ranging from $850 to $2000+ with an AOV of $1200. We’ll be looking at a particular upsell: a leather conditioning kit that helps protect the sofa, and costs between $40 and  $80. But these complimentary kits were not promoted heavily. The hypothesis was that by mentioning the conditioning kit in the cart, it would make it easy to add it and that would increase AOV.