Can you walk me through with this. Why am I getting it wrong?

Question 12 O / 2 pts Helmer produces guitars which costs him $174 in variable costs per unit to produce. Helmer wants to have a contribution margin on his guitar that equals 57 percent of the selling price. How much should his guitars sell for? Round your answer to the nearest cent. You Answered 273.18 Correct Answer > 404.65 margin of error +/- 0.02