Family Co. includes one coupon in each bag of dog food it sells. In return for eight coupons, customers receive a leash. The leashes cost Keane $4.00 each. Family estimates that 30 percent of the coupons will be redeemed. Data for 2007 and 2008 are as follows: 2007 2008 Bags of dog food sold 580,000 640,000 Leashes purchased 20,000 23,000 Coupons redeemed 130,000 180,000 The estimated liability for premiums at December 31, 2007 is how much?