Many business sell goods and services to their customers on a credit basis, allowing customers to pay for their purchases over a period of time. Which of the following is an advantage of credit sales? None of the answer choices are correct. Delayed receipt of cash O Increases the seller's revenue Bad debt costs Increased wage costs A machine is purchased on January 1, 2016, for $80,000. It is estimated to have a useful life of 4 years and a residual value of $6,000. The total output units the machine can produce are 50,000. In 2016, 10,000 units are produced. Under the units-of-production method, what is the book value of the machine on December 31, 2016? O $64,000 $65,200 $61,500 O None of the answer choices are correct. $59,200