Two-Way Frequency Table

You are hosting a surprise birthday party for your friend Jamie and made $4$ different cakes. You recorded how many people consumed what type of cake and put it in the two-way frequency table.

$$\begin{array}{|c|c|c|c|} \hline &\text{Chocolate}&\text{Vanilla}&\text{Total}\\ \hline \text{Rectangle}&?&13&36\\ \hline \text{Circle}&19&15&34\\ \hline \text{Total}&42&28&70\\ \hline \end{array}$$