The sensitivity of cost to volume for a postal system can be investigated directly provided the ratio of fixed to variable costs is known by function.
Postal system costs are linked to volume.
Postal system costs are not linked to volume.
Richelieu was an outsider who looked in as the queen mother firmly dictated national policy to the king.
A group of dogs standing and talking.
The country rose from the ashes of WWII to beome a large economic power.
The doctors are having lunch
The man is playing the saxophone in the orchestra.
A man with a lime green top hat and cane is riding the Loch Ness Monster.