How do you calculate the painting expenses for a Living Room in Lugano, including ceilings, 2 doors, and 1 windows, measuring 5m x 10m?

Meticulously calculating the painting expenses for a Living Room in Lugano, including ceilings, 2 doors, and 1 windows, measuring 5m x 10m, costs around CHF 659.00.

*) The calculations are approximate, based on a room height of 2.4m, and include one coat of paint. The price covers only the labor, excluding any services or materials.