he customers for your company purchase, on average, $ 339 per year. Your retention rate is 59 % and your firm uses a discount rate of 12 %. Acquisition costs are $ 119 . Finally, your firm incurs marketing communication/promotion costs of $ 43 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.