Horizontal analysis of income statement

For $20$Y$2,$ Macklin Inc. reported a significant decrease in net income. At the end of the year, John Mayer, the president, is presented with the following condensed comparative income statement:

Macklin Inc.

Comparative Income Statement

For the Years Ended December $31,20Y2$ and $20Y1$

$\backslash$table$[[,20Y2,20$Y$1],[$Sales$,$$$638,009,$$$579,000$