To determine the sales tax, we have to compute the 6.74% of 277.
Now, to determine the x% of y, we can use the following expression:
[tex]y*\frac{x}{100}.[/tex]In this case:
[tex]\begin{gathered} y=277, \\ x=6.74. \end{gathered}[/tex]Therefore, the 6.74% of 277 is:
[tex]277*\frac{6.74}{100}.[/tex]Simplifying the above result, we get:
[tex]18.6698.[/tex]Finally, rounding to the nearest cent, we get:
[tex]18.67.[/tex]