moorehead communications publishes a monthly sports magazine, walkabout preview, subscriptions to the magazine cost 20 per year. during december 2020, moorehead sells 15,000 subscriptions beginning with the december issue. moorehead prepares financial statements quarterly and recognizes subcription revenue at the end of the quarter. the company uses the accounts unearned subcription revenue and subscription revenue.

a. prepare the entry in november for the receipt of the subscription

b. prepare the adjusting entry at december 31, 2020, to record sales revenue recognized in december 2020

c. prepare the adjusting entry at march 31, 2021, to record sales revenue recognized in the first quarter of 2021