Bonita places a coupon in each box of its product. Customers may send in five coupons and $3, and the company will send them a recipe book. Sufficient books were purchased at a cost of $5 each. A total of 400,000 boxes of product were sold in 2010. It was estimated that 6% of the coupons would be redeemed. During 2010, 8,000 coupons were redeemed. Which entry should be made at December 31, 2010?