Solar Energy Systems (SES) sells solar heating systems in residential areas of eastern Pennsylvania. (Click the icon to view additional information.) Actual results for 2016 and 2017 for SES are: (Click the icon to view the actual results.) After experiencing high costs in 2016, SES used value engineering to reduce the cost of selling solar heating systems. Managers at SES want to evaluate whether value engineering has succeeded in reducing the selling cost per sale by the targeted 8% in 2017. Read the requirements. Data table for 2016 Actual Results Actual Results for 2017 Sales of heating systems 175 188 Number of new contacts 225 240 Miles driven 1,900 1,750 More info A successful sale results in the homeowner purchasing a solar heating system and obtaining rebates, tax credits, and financing for which SES completes all the paperwork. The company has identified three major activities that drive the cost of selling heating systems: identifying new contacts (varies with the number of new contacts); traveling to and between appointments (varies with the number of miles driven); and preparing and filing rebates and tax forms (varies with the number of solar systems sold). Actual costs for each of these activities in 2016 and 2017 are: 2016 2017 Average cost per new contact $ 8.00 $ 7.00 Travel cost per mile 0.55 0.65 Preparing and filing cost per new system 275.00 250.00