Calculate annual savings when switching from oil to geothermal heating.

A homeowner is considering replacing oil heating with rock heating. Current consumption of heating oil is 3500 liters per year. Assume that a liter of fuel oil has an energy content of 10 kWh and that the oil boiler's efficiency is 80%, ie it can use 80% of the oil's energy content. The proposed geothermal heat pump has an annual heating factor SCOP (seasonal coefficient of performance) of 4.1 when heating water to 55 C, which is the temperature required in the villa's radiator system. Google current oil and electricity prices for consumers and calculate the annual savings in euros the homeowner can be expected to receive when switching from oil to geothermal heating