How do you accurately estimate the painting costs for a Hall Room in Zurich, with excluding ceilings, 2 doors, and 2 windows, measuring 4m x 8m?

To accurately estimate the painting costs for a Hall Room in Zurich, with excluding ceilings, 2 doors, and 2 windows, measuring 4m x 8m, you need to pay CHF 456.00.

*) 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.