According to the producer price index database maintained by the Bureau of Labor Statistics, the average cost of computer equipment fell $3\mathrm{.}6$ percent between January and December $2018.$ Let's see whether these changes are reflected in the income statement of Computer Tycoon Incorporated for the year ended December $31,2018.$

$\backslash$table$[[,2018,2017],[$Sales Revenue,$$100,000,$$$120,000$