Answer using IRAC Method

Marcello is an olive grower. He lives a significant distance from his grove and spends four days a week on his block and the balance of the week at home. His neighbours are also olive farmers, but they live full time on their respective groves. Only days before harvest, Marcello is struck down with a virus that renders him unable to work on his farm. To add to this, the weather bureau has predicted a minor cyclone will pass through the olive groves. Faced with this warning and concerned for the losses that Marcello's trees might sustain, his neighbours decide to use their machinery to harvest Marcello's olives, as well as their own. They are not aware of Marcello's illness but are surprised by his absence. The harvest costs on Marcello's property amount to $3500. Is Marcello obliged to pay these costs?