Suppose a product's revenue function is given by R(q)=7q2+700q\displaystyle {R}{\left({q}\right)}=-{7}{q}^{{2}}+{700}{q}, where R(q)\displaystyle {R}{\left({q}\right)} is in dollars and q\displaystyle {q} is units sold. Find a numeric value for the marginal revenue at 37\displaystyle {37} units.

MR(37)=\displaystyle {M}{R}{\left({37}\right)}= $ per unit