In 1970, the unit cost was expected to be only $2.9m.

Unit costs have since increased to $21,000 in 2004 and $27,000 by 2011.

The unit cost of the system is currently $1 million.

Since 1997, the estimated unit cost for the system has increased by 182 percent.

This unit cost will decrease if total production is higher.

At this stage, one unit cost is calculated for each area.

The unit cost of the weapon was estimated at $4 million.

In 2012, industry reporters estimated that unit cost may come to $30 million.

We examine the effect of volume on unit total costs.

The number of people seen is high - up to 100 patients a day - thus ensuring that unit costs are kept low.