Demand The demand function for a product is given byp $=6,000144+$ e$0\mathrm{.}002$xwhere p is the price per unit $($in dollars$)$ and x is the number of units sold. Find the number of units sold when p $=$ $$300$ and p $=$ $$600.$ Use a graphing utility to verify your results in parts $($a$)$ and $($b$).($Round your answers to the nearest whole number.$)($a$)$p $=$ $$300$x $=$ units$($b$)$p $=$ $$600$