Hospital Equipment Company (HEC) acquired several fMRI machines for its inventory at a cost of $3,700 per machine. HEC usually sells these machines to hospitals at a price of $6,160. HEC also separately sells 12 months of training and repair services for fMRI machines for $2,640. HEC is paid $6,160 cash on November 30 for the sale of an fMRI machine delivered on December 1. HEC sold the machine at its regular price, but included one year of free training and repair service. Prepare journal entries would HEC record on November 30 and December 1? (Assume HEC uses a perpetual inventory system for recording the cost of goods sold.)

Depreciation on the company's equipment for 2017 is computed to be $18,000.the prepaid insurance account had a $6,000 debit balance at december 31, 2017, before adjusting for the costs of any expired coverage. an analysis of the company's insurance policies showed that $1,100 of unexpired insurance coverage remains.the office supplies account had a $700 debit balance on december 31, 2016; and $3,480 of office supplies were purchased during the year. the december 31, 2017, physical count showed $300 of supplies available.two-thirds of the work related to $15,000 of cash received in advance was performed this period.the prepaid insurance account had a $6,800 debit balance at december 31, 2017, before adjusting for the costs of any expired coverage. an analysis of insurance policies showed that $5,800 of coverage had expired.wage expenses of $3,200 have been incurred but are not paid as of december 31, 2017.

Employees at a library check out books to patrons. books have an isbn and a name. the library sometimes has multiple copies of the same book. books have one or more authors. a patron is an individual who has an active (non-expired) library card. for each library card, we store the person's first and last names and their address. for each employee, we store their employee id, current salary, first and last name and their address. we also store the employee id of their current manager. each time we check out a book to a patron we need to store the date of the transaction, the employee who checked out the book to the patron, and the library card of the patron. some employees have library cards. if an employee patron turns in a book late, the fine that they pay is a percentage of their salary. some employees are authors who have library cards—they are allowed to check out as many books as they like.

Differentiate between the trait, behavioral, and results-based performance appraisal systems, providing an example where each would be most applicable.