Explanation
We have that the cost of a Cupcake is $1.50
Also, the revenue generated is $16.50
Then, we can conclude that the number of cupcakes sold will be
[tex]number\text{ }of\text{ }cupcakes=\frac{revenue}{cost\text{ of a cup cake}}=\frac{\text{ \$16.5}}{\text{ \$1.5}}=11[/tex]Therefore, 11 Cupcakes are sold