The chart shows the bids provided by four engineers to test a prototype.
which is best supported by the information in the chart?
a jin is less cost-effective than greg because he charges more per day than greg.
b zoe is more cost-effective than orion because she takes less time to complete the project.
c jin is the least cost-effective because he charges the most per day.
d greg is the least cost-effective because he charges the most for the project.

An external consultant recommends that a plant installs a bank of capacitors for power factor correction. this will reduce the peak electrical demand charges by an average of 93 kw every month. the plant current pays $13 per kw in peak demand charges. the capacitor bank will include 223 kw of fixed capacitors, and 183 of variable capacitors. the fixed capacitors cost $59 per kw, and the variable capacitors will cost $65 per kw. the consultant charges 21% of the equipment costs to install the capacitors. because this project will reduce the demand for the electric utility, they are prepared to provide a one-time rebate of $42 per kw of reduced demand. what is the simple payback period for this project (in years)?