Answer :
Given:
Cost price, CP=$2.90.
Sales tax rate, S=6.25%.
The sales tax T can be found as,
[tex]\begin{gathered} T=\frac{S}{100}\times CP \\ =\frac{6.25}{100}\times2.9 \\ =0.18 \end{gathered}[/tex]Therefore, the sales tax of the glitter is $0.18.
Hence, option B is correct.