Norsums Department Store sells gift certificates that are redeemable in merchandise. During 2017, Norsums sold gift certificates for $88,000. Merchandise with the total price of $52,000 was redeemed during the year. The cost of the sold merchandise to Norsums was $32,000. Norsums sold gift certificates for the first time in 2017.
a. Record the sale of the gift certificates.
b. Record the redemption during 2017. Assume that Norsums uses the perpetual inventory method.

c. Compute the balance in the unearned revenue account as of December 31, 2018, assuming that gift certificates were sold for $60,000 in 2018 and merchandise with a total price of $80,000 was redeemed.