General Product Inc. distributed 180 million coupons in 2021. The coupons are redeemable for 20 cents each. General anticipates that 75% of the coupons will be redeemed. The coupons expire on December 31, 2022. There were 40 million coupons redeemed in 2021 and 30 million redeemed in 2022. General recognizes coupon promotion expense in the period coupons are issued. What was General's coupon promotion expense in 2021?