Groceries in Bandar Seri Begawan

This bottle holds 875 ml of body wash. It cost $6.40. 

A smaller bottle of 450ml cost $4.30. In Brunei there is no taxes. Also one can use Singapore currency here. 

What's the original volume of the $6.40 bottle given that 20% of it is free?

Without the free 20% is the bigger bottle still better value for money than the smaller bottle?

Location | The Mall in Brunei

in Seoul

in Helsinki

Pop Art in Jakarta

Pop Art at Pullman Hotel

How many art pieces need to be commissioned to fill the rooms and hallway of the hotel? 

It has 43 rooms per floor and 12 floors of guest rooms. Each room has two art pieces with 18 more lining the corridor of each floor. | Jakarta

Penang

Peabody