Various techniques have been proposed to curb cross-border drug smuggling into a country. The costs of implementing each strategy along a particularly rugged section of the border are indicated below. The table also includes a score that is compiled based on deterrence, interdiction, and apprehension, with a higher score indicating better performance. Determine the technique with the highest and the lowest cost-effectiveness ratio. For a budget of $55 million, determine the total cost of the most cost-effective techniques.

Activity	Cost, $	Score
Tethered Aerostats	3.3	8
Boots-on-the-Ground	30.1	52
Fence	11.2	12
Motion Sensors	6.8	7
Seismic Sensors	4.4	5
Drones	10.4	26

The activity with the lowest cost-effectiveness ratio is .....................?

The activity with the highest cost-effectiveness ratio is ....................?

The total cost is $ ............ million.