Thor Phe Company includes one coupon in each box of laundry soap it sells. A towel is offered as a premium to customers who send in 10 coupons and a remittance of P20. data for the premium offer are: 2018 2019 Boxes of soap sold 500,000 800,000 No. of towels purchased, P100 each 20,000 25,000 Coupons redeemed 150,000 200,000 The company's experience indicates that only 30% of the coupons will be redeemed. What amount should be reported as estimated liability for each year