Given the Following Process Layout Data for Locating Four Departments

Given the following process layout data for locating four departments (A, B, C, and D) in four areas (1, 2, 3, and 4): $\begin{array}{l}\text { Distances (meters) } \quad\quad\quad\quad\quad\quad \text { Flows (loads per week }\\\begin{array}{rlll}\text { From/To } & 1 & 2 & 3 & 4 \\\hline 1 & - & 50 & 100 & 150 \\2 & & - & 50 & 100 \\3 & & & - & 50 \\4 & & & & -\end{array}\quad\quad\begin{array}{rlll}\text { From/To } & \text { A } & \text { B } & \text { C } & \text { D } \\\hline \text { A } & - & 10 & 40 & 50 \\\text { B } & 30 & - & 10 & 70 \\\text { C } & 60 & 10 & - & 40 \\\text { D } & 30 & 50 & 20 & -\end{array}\end{array}$ If transportation costs are $.25 per load per foot moved, what are total monthly costs for an optimum layout?