How do you determine the precise painting service cost for a Living Room in Bern, considering including ceilings, 1 doors, and 2 windows, with dimensions of 6m x 5m?

Determining the precise painting service cost for a Living Room in Bern, considering including ceilings, 1 doors, and 2 windows, with dimensions of 6m x 5m, costs CHF 538.00.

*) 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.