Katie ordered candles that cost $3 each from a website. She was charged a flat shipping fee of $6 and no sales tax. If she spent a total of $54, which equation can be used to find c, the number of candles she ordered?

The candles cost $3 each, so c candles cost 3c dollars. Add the flat $6 shipping fee to get the total: 3c + 6 = 54. Choice C gives the equation that matches the total cost.

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