Marigold Corp. includes one coupon in each bag of dog food it sells. In return for eight coupons, customers receive a leash. The leashes cost Marigold $5 each. Marigold estimates that 40 percent of the coupons will be redeemed. Data for 2020 and 2021 are as follows: 2020 2021 Bags of dog food sold 480000 590000 Leashes purchased 19000 22000 Coupons redeemed 100000 150000 The premium liability at December 31, 2021 is