The Min Cost Flow Problem: Another Oil Pipeline

Example

$An$ oil company wants $to$ pump $5$ mega$-$barrels from $AtoD$

pumps oil from $an$ oil well $stoan$ oil refinery $t$

Each arc has $an$ associated capacity and cost

$AB$ : allows $4$ mega$-$barrels, cost $of$ $$10\frac{k}{?}$ mega$-$barrel

$AC$ : allows $2$ mega$-$barrels, cost $of$ $$12\frac{k}{?}$ mega$-$barrel

Goal: Send $5$ mega$-$barrels $of$ oil from $AtoD$ while

minimizing the cost

Please solve and provide AMPL code $if$ possible