Hi Chartotte:  Whenyou take your olives to the mill, you can choose to either have your olives pressed for oil, or sell them to the mill.  90% of the time most people sell their olives to the mill FOR MONEY!!  about 300-350 kilos of GOOD olives will give you about 100 litres of oil. The price this year for olives has been very low, and ours topped out at about 37 cents a kilo  You should also get the opportunity to register for the "pagament unica" from the government.

Let us know if you need to know more.

Liz