To calculate the Materials and Cost of your Bath :

In the first line 'Floor' in the drop-down menu in the fields 'Length' and 'Width' select the number you wish, for example 2.70, 1.80.
In the second line 'Wall-1' in the drop-down menu in the fields 'Length-1' and 'Height' select the number you wish, for example 2.50, 2.10.
Do the same and for the 'Wall-2' 'Wall-3', and 'Wall-4', inserting the appropriate numbers for length and height.
In the fields 'Floor-Tiles-Cost' and 'Walls-Tile-Cost', select from the drop-down menu, the appropriate price.
In the field "Total Area" the total area is displayed, and in "Tiles-Total-Cost" the total cost.
If you wish, you can change the data by entering new one. To delete the data and return the table to its original form, do a reset.