Create a two-way model

The Public Works Department in Georgetown has a mechanical shop liable for selling an inspector, called Vehicle Testing Monitor 2016 (VTM 2016), which will be retailed for $500. The director, Erick, wants a model to help him obtain an adequate number of VTM2016. Erick can get the testers from the manufacture, but the total value depends on the quantity requested, as shown in Table 1. Erick is uncertain about the demand for the VTM2016. He predicts that the need could be the range from 300 to 2000. Also, the next year VTM 2017 will be in the market, if Erick has VTM2016 left, he will put them on clearance for $200, at which price it considers all leftovers will be sold.

the unit cost is $450, if the number ordered is <100

the unit cost is $400, if the number ordered is 100-200

the unit cost is $350, if the number ordered is 200-300

the unit cost is $300, if the number ordered is 300-400

the unit cost is $250, if the number ordered is 400-500

the unit cost is $200, if the number ordered is 500-600

the unit cost is $150, if the number ordered is >600