There Are Three Jobs to Be Done and Three Resources

Short Answer

There are three jobs to be done and three resources with which to do them. Each resource will take a specific time to do each job, as shown in the following table:
$$\begin{array} { l c c c } && { \text { Machine } } \\\text { Job } & \text { A } & \text { B } & \text { C } \\\hline 1 & 6 & 9 & 4 \\2 & 4 & 4 & 3 \\3 & 8 & 7 & 4\end{array}$$ Can an optimum assignment be made after the row and column reductions?