Problems $4-5$ to $4-7($Static$)$

Suppose that AlwaysRain Irrigation$$s marketing department will undertake an intense ad campaign for the bronze sprinklers, which are more expensive but also more durable than the plastic ones. Forecast demand for the next four years is:

YEARLY DEMAND

$1($IN $000$s$)2($IN $000$s$)3($IN $000$s$)4($IN $000$s$)$

Plastic $9032445556$

Plastic $18015161718$

Plastic $36050556467$

Bronze $9011151823$

Bronze $1806569$

Bronze $36015161720$