The edges on Derek's snowboard are chipped and dented from riding over rocks, so Derek wants to buy a new one. He can't afford the board he wants, so he opens a hot chocolate stand near his house. Derek figures out how many cups of hot chocolate he must sell to have enough money for the snowboard. One cold, snowy Saturday, Derek sells 48 cups of hot chocolate. Now, he needs to sell 52 more cups to buy the snowboard. Which equation can you use to find the total number of cups c Derek must sell to buy the snowboard?