Bounce has developed a new type of fabric sheet. As a promotion, they mailed out 5,000 free-trials to generate interest. The mailing costs were $2,000, the production costs were $3,000. of the households receiving the mailer, they estimate that 10% will try the product. of those who try it, they speculate that 50% will continue to purchase the product that includes 20 sheets for $5 per box, at a rate of 1 box every 2 months. How many months until they will have sold enough boxes to pay off this campaign