Jean Valjean is buying candlesticks and plates for his new French restaurant. He has $60 to spend on plates and candlesticks. Each plate costs $3. Each candlestick costs $6 (it comes with free candles). Jean needs to buy a total of 15 items. How many plates and how many candlesticks does he buy? Enter using an ordered pair. (number of plates, number of candles.