On July 10, 2020, Nguyen Ltd. sold $1.7 million worth of compressors to retailers on account. Nguyen had paid $960,000 for these compressors. Nguyen grants the right to return compressors that do not sell in three months following delivery. Past experience indicates that the normal return rate is 15%. By October 11, 2020, retailers returned compressors to Nguyen and were granted a cash refund totalling $248,000. Prepare Nguyen's journal entries to record 

(a) The sale on July 10, 2020, 

(b) $248,000 of returns on October 11, 2020. 

Nguyen uses a perpetual inventory system and follows IFRS.