The customers for your company purchase, on average, $ 355 per year. Your retention rate is 60 % and your firm uses a discount rate of 11 %. Acquisition costs are $ 109 . Finally, your firm incurs marketing communication/promotion costs of $ 49 per customer per year. What is the necessary margin (as a percent of sales) to breakeven? In other words, at what margin (as a percent of sales) is CLV = 0? Record your answer as a percentage, rounded to one decimal place.

Answer: 39.9