In January 2020, a retailer sells 100 paper shredders to customers for $100 each. The terms of the sales include a right for the customer to return a shredder within 180 days of the sale date. Based on historical trends, the retailer uses the expected value method and estimates a 40% probability that 8 paper shredders will be returned, a 45% probability that 9 paper shredders will be returned, and a 15% probability that 12 paper shredders will be returned. The retailer also concludes it is highly probable that there will not be a significant reversal of revenue recognized based on this return estimate. Thus, the agreement is a valid contract. Assume no actual returns in January 2020.

Determine (1) the transaction price for the sale of shredders for January 2020, and (2) the refund liability balance on January 31, 2020. Round expected returns to the nearest whole unit in your calculations