Mark Wood ABCDe Race AaBb Acc Aa Mark's Ceramics spent 54000 on a new kiin last year in the belief that would cut energy usage 25% over the old on. This kiln is an oven that turns "greenware" into finished pottery Mark is concerned that the new din requires extra labor hours for its operation Mark wants to check the energy savings of the new oven and also to look over other measures of their productivity to see if the change realy was beneficial Mark has the following data to work with Last Year This Year Production (finished 4000 4000 units) Greenware (pounds) 5000 5000 Labor (hr) 350 375 Capital () 15000 19000 Energy (kWh) 3000 2500