The Jenck Auto Supply has a total revenue function given by

R(x)=2450x5x2\displaystyle {R}{\left({x}\right)}={2450}{x}-{5}{x}^{{2}}

where x is the number of units sold

limx70R(x)=\displaystyle \lim_{{{x}\rightarrow{70}}}{R}{\left({x}\right)}=