The customers for your company purchase, on average, $365 per year. Your retention rate is 60% and your firm uses a discount rate of 11%. Acquisition costs are $100. Finally, your firm incurs marketing communication/promotion costs of $ 42 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