The marginal cost function associated with producing $x$ widgets is given by

$C^{\text{'}}(x)=-0\mathrm{.}2x+25$

where $C^{\text{'}}(x)$ is measured in dollars$/$unit and $x$ denotes the number of widgets. Compute the total cost incurred from producing the $11$ th through $30$ th units of the day.

$$ dollars