At what production level would X Company be indifferent between making the part and buying it? \begin{tabular}{|l|l|l|l|l|l|} \hline \hline A: 1,307 & O B: 1,738 & OC: 2,311 & D: 3,074 & C: 4,088 & OF: 5,437 \\ \hline \end{tabular}