[tex]\begin{gathered} \text{The total cost of the experience is } \\ Bill+(Bill\cdot\frac{20}{100}) \end{gathered}[/tex][tex]\begin{gathered} \text{Then, the cost of the experience is } \\ 24.50+(24.50\cdot\frac{20}{100})=24.50+(24.50\cdot0.2) \\ =24.50+4.9 \\ =29.4 \end{gathered}[/tex]
And the cost is $29,40