_______________% Im selling toy cars I buy them for $2.25 and sell them for $8. I run a price promotion of buy 3 and get one for half price. What is my average markup on the cost of each car?

\begin{tabular}{l|l|l|l} Cost & Markup%oncost & Markup%onRetail & Retail Price \\ \hline$100 & 1500% & & \\ \hline$500 & & 60% & \\ \hline & 2% & & $30.60 \\ \hline & & 25% & $200 \end{tabular}