Suppose a product's revenue function is given by $\displaystyle {R}{\left({q}\right)}=-{6}{q}^{{2}}+{600}{q}$, where $\displaystyle {R}{\left({q}\right)}$ is in dollars and $\displaystyle {q}$ is units sold.

Find a numeric value for the marginal revenue at $\displaystyle {13}$ unitsand record your result in the box below.

Answer: $\displaystyle {M}{R}{\left({13}\right)}=$ $\displaystyle \${p}{e}{r}{u}{n}{i}{t}$