The following supply, demand, cost, and inventory data $($provided below$)$ has been made available to you by the CEO. He has requested you to allocate production capacity for P&G to meet demand at minimum cost using the transportation method. Determine the cost of the plan. Assuming the initial inventory has no holding cost in the first period and backorders are not permitted. Use the provided information to answer the questions.

Supply Available:

$\backslash$table$[[$PERIOD$,\backslash$table$[[$REGULAR$],[$TIME$]],$OVERTIME,SUBCONTRACT,$\backslash$table$[[$DEMAND$],[$FORECAST$]]],[1,30,10,5,40],[2,35,12,5,50],[3,30,10,5,40],[$Initial Inventory,$20$ units$],[$Regular$-$time cost per unit,R$100],[$Overtime cost per unit,$R150$