I must respectfully disagree.
The key word in "MSRP" is "Suggested". A manufacturer selling to retailers absolutely cannot demand an item be sold a particular price. The retailer can sell an item at any price they please. If a manufacturer tells a retailer "I won't sell my product to you unless you sell it for $XX.XX.", that is called "price fixing" and is a federal crime.
The above scenario happened to a friend o' mine who runs a video and comics business. She almost got the idiot-in-charge (re: misogynist jerk) to put his demands in writing, but one of his underlings kept him from going forward. Instead, year-after-year he simply "doesn't have any items to sell to you at this time."