Invariant-mass distributions of $\Dzero$, $\Dplus$, and $\Ds$ candidates and charge conjugates in $1\pt2~\gevc$, $8\pt10~\gevc$, and $2\pt4~\gevc$ intervals, respectively. The blue solid lines show the total fit functions as described in the text and the red dashed lines are the combinatorial background. In case of the $\Dzero$ candidates, the grey dashed line represents the combinatorial background with the contribution of the reflections. The raw-yield ($S$) values are reported together with their statistical uncertainties resulting from the fit. The fraction of non-prompt candidates in the measured raw yield is reported with its statistical and systematic uncertainties.