Burlington Motor$$ Carriers, a trucking$$ company, is considering the installation of a$$ two$-$way mobile satellite messaging service on its$2,000$ trucks. From tests done last year on $120$ trucks, the company found that satellite messaging could cut $\%$ of its $$$ million bill for$$ long$-$distance communications with truck drivers. More$$ importantly, the drivers who used this system reduced the number of$$ "deadhead" miles