Someone (mag-) commands, instructs, orders someone (-en) to do something.
Magbilin kas tawo a maytarabāko.
Order the person to work.
Bilinen mo saw tawo a maytarabāko.
Someone (mangi-) gives an order for something (i-) for someone (i--an).
Mangibilin ka so āgas mo do magbyahi do Calayan.
You order your medicine from the one taking a trip to Calayan.
Ibilin mo di āmang karga mwaw.
You order your cargo from your father.