Number of Trays no longer used
Total Cost Savings
5,000
$100,000
6,000
$190,000
7,000
$270,000
8,000
$340,000
9,000
$400,000
10,000
$450,000
11,000
$490,000
12,000
$520,000
13,000
$540,000
14,000
$550,000
Obviously, based purely on these numbers, it looks as if the college stopped using 14,000 trays in the cafeteria, they would save approximately $550,000 in energy costs. This looks pretty good from this experiment. However, eliminating trays it meant that the college would need to hire more people or pay the people that are already working more hours in order to bus and clean the tables after each meal period. By doing this, it raises the cost of labor to an additional $20.00 for every tray no longer used. Using this information, we have the following chart to show what the extra labor would be per the reduction of trays.
Number of Trays no longer used
Labor Costs - $20 per tray not used
5,000
$100,000
6,000
$120,000
7,000
$140,000
8,000
$160,000