For this project, you're going to investigate the costs to fill a 1,250 gallon propane tank to different levels.
Use the following table to determine propane costs based on the amount you will purchase.
The propane company gives a discount when you buy more.
100  500 gallons: $2.76/gallon
501750 gallons: 5% discount
7511000 gallons: 10% discount
Over 1000 gallons: 15% discount
The propane company gives a discount when you buy more.
100  500 gallons: $2.76/gallon
501750 gallons: 5% discount
7511000 gallons: 10% discount
Over 1000 gallons: 15% discount

You decide it's too expensive to fill up the tank the whole way, so you tell the company to only fill it 75% full.
You decide that's still too expensive, so you tell the company to only fill it 65% full.