XYZ Inc offers a gift set to customers who send in $1.11 plus three coupon codes obtained from the purchase of the company's standard products. That is, a customer purchases three standard products which come with a coupon each, sends everything in along with the cheque for the amount above, and receives the gift set in the mail a few weeks later. During the year, the company acquired an adequate number of gift sets for $2.63 each using cash to meet the promotion's demand. During the year, the company sold 1,062,960 of its standard products for $4.15 each. The company estimated that 10% of the sales amount received from customers would relate to the gift set to be awarded. The company would expect 34.31% of the coupons to be sent in eventually, and, during the year, 255,110 coupons were redeemed. If the company followed IFRS using the revenue approach, how much unearned revenue would be shown as a liability at the end of the year for the coupons yet to be redeemed? a. $139,185 b. $129,244 c. $142,499 d. $135,872 e. $132,558