2000× (1-40%) =1200 yuan (including materials, chef's salary, seasonings, utilities, etc. , excluding venue rent and buyer's salary).
If there are multiple formulas, each one can be calculated according to this formula. The chef's salary and utilities can be shared, and the formula is:
The sharing rate of a dish = the material of a dish/the total cost of materials for the whole month.
Salary for sharing one disc = monthly salary × sharing rate for one disc.