Develop a cost calculator for an apartment

It is necessary to develop a calculator for the cost of apartments. The analogue is on Texte caché (link - calculate the cost).

Shape parameters:

(1) Select the number of rooms
- 1-room.
- 2-room.
- 3-room.
- 3-room in 2 levels
- 4-room in 2 levels

(2) Select a floor
1, 2, 3, 4, 5, 6, 7, 8, 9

(3) Select the layout (area of the apartment)
- If 1-bedroom apartment, then 47.34 / 49.11 / 53.95
- If 2-bedroom apartment, then 66.62 / 66.64 / 70.09 / 71.61 / 71.65 / 72.33 / 76.37
- If 3-room apartment, then 80.96 / 98.07
If 3-room apartment in 2 Ur, then 111,03
If a 4-room apartment is 2 Ur, then 149.77

(4) Select the initial contribution
- If 40%, then 2% off.
- If 60%, then 4% discount
- If 80%, then 6% discount
- If 100%, then 8% discount

As a result:
- Basic cost per square meter
- Basic cost of the apartment
- The size of the discount (in percentage and in rubles)
- The final cost of the apartment

Budget is being discussed.